Which of the following is a possible equivalence that can be used in a conversion? a. ten to the negative second power hl over one l b. ten to the negative second power cl over one l c. ten to the first power l over one dal d. ten to the negative first power l over one ml

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.