Will give brainliest and 100+ points!!

Please help me fill in the top first part and bottom second part!!

Explanation:

for valence electrons, look in the group of that particular element and it's outer shell holds the number of electrons indicated in the group it is in.

girl imma just put my comment here because i need a couple point okurrttt

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.