What are two processes that result in rocks being broken down into smaller pieces ! ? a. sedimentation and glacial melting b. chemical weathering and physical weathering c. chemical weathering and dissolving d. physical weathering and precipitation

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.