When finding the mean, or average, of a set of numbers you divide the sum of the group of numbers by the number of items in the group.
What is the average height for the 3 trials listed below?
6 cm
4 cm
2 cm
12 cm
6 cm
2 cm
4 cm

4 cm

Explanation:

To figure out the mean/average add the number together and then divide the number on how many numbers are there.

6+4+2 = 12

12/3 = 4

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.