If you are playing tug of war with your friend and you move your friend 3 meters using a force of 5 N, How much work did you do?

Work was 15 Joules

Explanation: Work W = force F · distance s

W = 5 N · 3 m

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.