Concept:Farm power is the energy source used to do farm work.
Explanation:Most West African farmers operate on a small scale.
They cannot easily afford tractors, machines, or fuel.
Animal power is cheap and readily available in rural areas.
It is simple to maintain and suitable for small farms.
Animals can be used for ploughing, ridging, and transport.
They also do not cause pollution.
These reasons make animal power the most adaptable source.
Answer:A. animal power