Why are we still dependent on oil and coal energy

Because oil helps the world from pollution. Coal energy is also important.

Explanation:

air quality

poor drinking water

and heavy polution

can lead to poor health

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.