What type of bonding is shown in the diagram above? A.
covalent bonding because one atom gains an electron and the other atom loses an electron
B.
ionic bonding because the atoms are sharing electrons
C.
covalent bonding because the atoms are sharing electrons
D.
ionic bonding because one atom gains an electron and the other atom loses an electron

D.

ionic bonding because one atom gains an electron and the other atom loses an electron

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.