Andreas wrote the following hypothesis: "if the number of livestock on earth increases, then the amount of methane gas in the
atmosphere will increase because cows produce methane gas as a by-product of digestion."
what scientific question is his hypothesis most likely addressing?
•what is the effect of livestock on the amount of methane gas?
•what is the effect of livestock on earth?
• what is the effect of methane gas on the atmosphere?
•what is the effect of methane gas on digestion in livestock?

A. What is the effect of livestock on the amount of methane gas?

the answer is 75.0%.

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.