Which of the following is NOT an economic activity?

1. A

   Farming

   Farming involves the cultivation of crops and rearing of livestock for sale, which directly generates income and is thus a recognized primary economic activity.

2. B

   Service

   Service includes various occupations and professions performed in exchange for wages or salaries, making it an essential component of the tertiary sector.

3. C

   Voluntary Social Service

   Voluntary Social Service is undertaken out of altruism, empathy, or civic duty without any expectation of monetary compensation or financial gain, and therefore it is completely excluded from the classification of economic activities.

4. D

   Transportation

   Transportation entails the movement of goods and people from one place to another for a fee or freight charge, establishing it firmly as a commercial economic service within the tertiary sector.

Summary. Official key is (c) Voluntary Social Service. Economic activities are typically defined as those efforts and tasks undertaken to earn a living, generate income, or produce goods and services for monetary exchange. Farming, services, and transportation all involve commercial transactions and financial remuneration. In contrast, voluntary social service is driven by philanthropic motives without any monetary reward. Therefore, it stands apart as the only non-economic activity among the given choices.