Which of the following BEST defines a general state of matter?" Il is either liquid or a solid
it is either ice or water
It is the form a substance has when the substance is at a certain temperature,
It is how much of a substance will fit within a given area

you need to give more information

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.