The main source of power for subsistence agriculture is

A.

Animal

B.

Machine

C.

Electricity

D.

Man

Correct answer is D

The main source of power for substinence agriculture is man. Substinence agriculture involves the production of food on a small scale by a farmer to cater mainly for his family. As a result, the use of machinery is not needed, rathe the farmer relies on man power to achieve everything he needs to carry out on the farm.