Evidence in the fossil record points to
major asteroid impacts that have caused mass extinctions in which 50%–96% of life on earth died out

Evidence in the fossil record points to  ()major asteroid impacts that have caused mass extinctions in which 50%–96% of life on Earth died out

It is 5.

Points to __5___ major asteroid impacts

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.