1. Circle the one in each pair represents a greater number of items a) 5 dozen mole of lithium atoms
or
60 mole of sulfur atoms
b) 0.75 mole of cars
or
4.5x1023 cars
c) 7701 baseballs
or
7.710 x 10 baseballs

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.