An ectotherm is an animal that relies on environmental interactions to control its body temperature. which of the following animals is an ectotherm?
a) robin
b) koala
c) horse
d) anaconda

D)

Explanation:

An anaconda is a reptile and an ectotherm. Ectotherms lack fur or feathers which supply insulation. Ectotherms are commonly called "cold blooded" animals and include frogs, turtles, snakes and fish.

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.