What is the process for deriving a chemical formula from a compound name?

The name of a compound usually gives you all the information you need to write its chemical formula. The first part of the name denotes the cation, or positively charged ion that forms the molecule, while the second part denotes the anion, or negative ion.

Explanation:

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.