For each of 3 trials state the following:

heat needed to melt the ice (q)

Enthalpy of fusion

Percent error from the accepted enthalpy of fusion of water of 334 J/g

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.