Elements and compounds are more similar to each other than they are to mixtures because:

elements and compounds cannot be reduced to simpler substances by physical or mechanical means, but mixtures can

elements and compounds can only be liquids or solids, but mixtures can be solids, liquids or gases

elements and compounds can be homogeneous or heterogeneous, but mixtures can only be heterogeneous

elements and compounds do not have fixed melting points, but mixtures do

elements and compounds can only be liquids or solids, but mixtures can be solids, liquids or gases

Explanation:

Element: A substance that is made up of only one type of atom. Compound: A substance that is made up of more than one type of atom bonded together. Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties.

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.

it's c (engineer's do their work with mechanical stuff not on any living being)