Classify primary, secondary and tertiary activity
Classify businesses by whether they extract resources, process materials or provide services.
Section 1 · Understanding business activity
Exam scope and assessment notes
Cambridge IGCSE Business Studies 0450, 2026 syllabus, Version 2. Use the 2026 A*–G route; this qualification changes to 0264 for first assessment in 2027. Candidates are not assessed on constructing income statements or statements of financial position, nor on price-elasticity or exchange-rate calculations. Simple cash-flow forecast construction is assessed. Written practice is self-checked, not an official Cambridge grade; timed-paper evidence and human subject-teacher review remain outstanding.
Before you begin
- No previous business study is assumed. Read each scenario for the decision-maker, objective, available evidence and constraints.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
Which sector extracts natural resources?
What you will learn
- Define the three economic sectors
- Classify business activity
- Explain sector changes over time
Follow what the business does
Primary activity extracts or obtains natural resources, such as farming, fishing or mining. Secondary activity manufactures or processes materials into goods, including construction.
Tertiary activity provides services, such as retail, transport, banking, education or healthcare. Classify the activity described, not simply the company's name or its customers.
Trace a value chain
A raw-cocoa farm is primary, a chocolate factory is secondary and a retailer is tertiary. A finished product may pass through all three sectors.
A business can operate in more than one sector. State the activity being classified and avoid assuming that a country or company can only have one dominant sector forever.
Pause and explain
A factory converts cotton into clothing. Which sector is this?
Worked example
A company mines copper, another turns it into wire, and a third installs electrical wiring in buildings. Classify each activity.
Show the worked solution
- Mining obtains a natural resource.
- Making wire processes material into a product.
- Installation is a service.
Answer Mining: primary; wire manufacture: secondary; installation: tertiary.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Classify a wheat farm, a flour mill and a bakery café that sells bread and serves meals. Explain the café's main sector.
Give me a hint
Identify extraction, processing and service provision.
Compare my reasoning
- Growing wheat obtains a natural product.
- Milling processes it into flour.
- The café mainly provides food service to customers.
Farm: primary; mill: secondary; bakery café: mainly tertiary because it provides a service, though it also makes bread.
Look for these in your work
- First two activities classified
- Mixed activity acknowledged
- Main activity justified
An economy's employment shifts from agriculture to manufacturing and later to healthcare and retail. Classify the sectors and describe the pattern without claiming that agriculture disappears.
Give me a hint
Name the sectors and use cautious language about relative employment.
Compare my reasoning
- Agriculture is primary.
- Manufacturing is secondary.
- Healthcare and retail are tertiary; shares can change without a sector reaching zero.
Employment is shifting toward secondary and then tertiary activity. The primary sector can remain important even if it employs a smaller share of workers.
Look for these in your work
- Sectors matched
- Change described
- No absolute claim
A supermarket company owns farms, food-processing plants and stores. Can it be assigned to one sector without a stated classification rule? Explain.
Give me a hint
Consider the distinct activities in the value chain.
Compare my reasoning
- Farms are primary activity.
- Processing plants are secondary.
- Stores provide retail services in the tertiary sector.
Not reliably: the company operates in all three sectors. A response should state whether it classifies the whole company by its main activity, employment, output or a specified business unit.
Look for these in your work
- All sectors identified
- Mixed operation recognized
- Rule requested
Common mistakes
- Calling all businesses that sell goods secondary
- Classifying from the company name instead of its activity
- Treating the three sectors as mutually exclusive for every large business
What can you explain now?
Which sector extracts natural resources?
Compare with the explanation
Primary
Mining, fishing and farming are examples.
After trying it yourself, choose your next review. This is your self-assessment.
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Make it stick
Describe one product moving through the primary, secondary and tertiary sectors.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.