In a soil profile, which is the second layer?
solid rock
subsoil
parent rock
topsoil

Subsoil is the layer of soil under the topsoil

Explanation:

c. is the answer

by love gaming

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.