In general, what does a spectrometer do?
2. What parts of the electromagnetic spectrum are most commonly analyzed by
spectrometers?
3. What are the parts of a spectrometer of the type used to analyze visible light?
4. How are the types of spectra obtained by spectrometers in the visible range
categorized? What do these different types of spectra look like?

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.

i believe the answer is 5,000