How is the kinetic energy of the particles of a substance affected during a phase change?
kinetic energy increases during exothermic changes and decreases during endothermic changes.
kinetic energy decreases during exothermic changes and increases during endothermic changes.
kinetic energy does not change, but the potential energy does.
kinetic energy changes in the opposite way that the potential energy changes.

The correct answer is C :-)

it's all four options.

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.