Concept:The diagram shows a windmill, which uses wind energy to generate power for farm work.
Explanation:Wind power is a natural and renewable source of farm power.
It does not require fuel and is free to use.
Wind is present in many places, so wind energy can be harnessed in many locations.
Therefore, its main advantage is that the power source is widely or generally available.
Although wind power may not be easy to store, may not be usable for all operations, and is not perfectly easy to control, availability is the most fitting advantage from the given options.
Answer:D. is available everywhere
