Concept:Primary economic activities extract raw materials directly from the environment.
Explanation:Farming involves growing crops and rearing animals using land and nature.
It produces raw materials without further processing.
Therefore, farming is a primary economic activity.
Manufacturing and food processing change raw materials into finished goods, so they are secondary activities.
Transportation moves goods and people, which is a service, so it is a tertiary activity.
Thus, the correct answer is farming.
Answer:D. Farming