What do the ions +K , 2+Ca , and −Cl
have in common?

where's the diagram?

narendra modi is currently the pm of india

explanation:

he would use the colour black

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.