The three economic sectors group activities by what they do.
Primary takes natural resources from the earth or sea. Secondary turns materials into products or builds things. Tertiary provides services.
Questions on this appear in enterprise and business purpose and again when a case describes how a business has changed.
How do you classify one activity?
Ask what the activity does to a product, not what the business sells.
- If it extracts or grows something from nature, it is primary.
- If it processes, makes or builds, it is secondary.
- If it serves, sells, moves or advises, it is tertiary.
Say the sector for each activity in one short sentence with a reason. For example: “Freezing and packing fish is secondary because it processes a raw material.”
A business is often in more than one sector. Write that clearly rather than forcing one label.
Worked example
Sungai Emas Fisheries operates from a coastal town. In one week it does these three things.
- Catches fish with its own boats.
- Cleans, freezes and packs the fish in a small plant.
- Delivers the packs to restaurants and sells at a market stall.
Step 1, activity 1. Catching fish takes a natural resource from the sea, so it is primary.
Step 2, activity 2. Cleaning, freezing and packing turns raw fish into a packaged product, so it is secondary.
Step 3, activity 3. Delivering and selling are services between producer and customer, so they are tertiary.
Step 4, conclusion. The firm operates in all three sectors. A good exam sentence is: “Sungai Emas is mainly primary because it catches fish, but the freezing plant adds a secondary activity and the delivery adds a tertiary one.”
The mistake to watch for
Mistaken answer: “A restaurant sells food, so it is secondary.”
This classifies by the product, food, rather than by the activity.
A restaurant serves customers at a table, which is a service, so it is usually classed as tertiary.
Cooking inside a restaurant does make food, but the business sells an eating experience, and course notes normally treat it as a service. Check how your own teacher classifies mixed cases. The firm making packaged curry sauces in a factory is secondary.
Check yourself
1. Classify each: tin mining, a tailor making school uniforms, a tuition centre, a house builder, timber logging.
Show answer
Tin mining: primary. Tailor making uniforms: secondary. Tuition centre: tertiary. House builder: secondary, because it builds. Timber logging: primary, because it takes material from nature.
2. A bakery bakes bread in the back and sells it from the front counter. Which sectors does it operate in?
Show answer
Secondary, for baking, which makes a product from ingredients. Tertiary, for retail sales to customers. It operates in two sectors.
3. A town has 10,000 workers: 800 in the primary sector, 2,500 in the secondary and 6,700 in the tertiary. What percentage work in the tertiary sector?
Show answer
First check the total: 800 + 2,500 + 6,700 = 10,000. Then 6,700 ÷ 10,000 × 100 = 67%. For reference, primary is 8% and secondary is 25%.
Where this leads next
Sectors help you describe what a business does. The next lesson, compare an entrepreneur’s objectives over time, looks at why the owner does it and how the aim shifts as the business grows.
If mixed businesses keep tripping you up, ask a teacher to run a quick sort with fresh examples in online one-to-one Business tuition.