I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
What this student is doing is collecting data. So, he wants to check how many life forms there are in the waters nearby. In order to do so, he has to take a sample, and look at it through a microscope so as to determine the number. So, he collected a sample which is his data. He is not drawing conclusions yet, but rather counting these organisms. He is not making a peer review - his peers aren't even mentioned here. He is not forming a hypothesis because he is just counting at this point.
Calcite is the most common rock
Answer:
D
Explanation:
This is because the atmosphere is refreshable and makes breathing so conducive.
