Which scenario best illustrates a scientist using appropriate tools for a scientific investigation?

An example of a good question is, "How does fertilizer affect plant growth?" This is simple, measurable and can be done in the lab. A poor scientific question might be, "Where did life come from?" We can't answer this in the lab, and there aren't good tests to answer it either!

i forget

Explanation:

answer; polycythemia is the correct answer;