Newtons second law in your own words.

behavior of objects for which all existing forces are not balanced.

Explanation:

F=ma. Force is equal to mass times acceleration. The accleration of an object depends on the net force.

Explanation:

I know its F=ma but I think this is right I hope it helps

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.