Sulfur has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is amu. i. Isotope % Mass

ii. 32 S 95.00 31.97

iii. 33 S 0.75 32.97

iv. 44 X 4.25 33.97

2b2t

explanation:

2b2t

answer: they produce more slow than unicellular organisms.

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.