Why do we have hair and why does it grow?

Explanation:

All women have facial and body hair, but it's normally quite a bit less than men. Women can develop hirsutism, which causes body hair growth in places where men usually grow it, like on their face (beard) or chest. The condition is an abnormal amount of male hormones.

The scalp also may have kept hair because it helped the body retain heat, but there is also the likelihood that the hair of the scalp was seen as esthetically pleasing and therefore attracted a mate more readily.

Each hair follicle has its own blood supply, and it’s possible that one side of the head has better circulation. Better circulation means faster hair growth. Consistently sleeping on the same side of the head can also cause that side to grow more slowly. After a stressful event

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work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.