What happens to the blood that reaches the lungs from the pulmonary artery?
picks up co2 and releases o2
picks up co2 and o2
picks up o2 and releases co2
releases o2 and co2

picks up O2 and releases CO2

Explanation:

The pulmonary artery represents a structure within pulmonary circulation that is responsible for carrying deoxygenated blood to the lung.

When blood from the pulmonary artery reaches the long, it becomes oxygenated an in return, the CO2 it carries is released into the lung in a process otherwise known as gaseous exchange.

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.