The diagram below shows an inclined plane (in red) that movers use to raise heavy objects against the force of gravity and into a truck. Which of the following is true about the simple machine shown in red?

what are the choices?

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.