Concept:The processing industry adds value by converting raw primary products into finished or semi-finished goods.
Explanation:Primary products are raw materials obtained directly from nature, such as crops, fish, timber, and minerals.
These products have little economic value in their natural state.
The processing industry transforms them into usable goods, which increases their market value.
For example, processing crude oil into petrol or converting raw cocoa into chocolate adds significant value.
Mining and construction only extract or use primary products, while services do not directly change the product form.
Therefore, processing industry adds more value to primary products than the other options.
Answer:B. Processing industry