The answer is foreign pathogens.
Answer:
hypothesis
Explanation:
A hypothesis is a possible logical answer to a scientific question, based on scientific knowledge. A prediction is a statement that tells what will happen under certain conditions. Evidence is any type of data that may either agree or disagree with a prediction, so it may either support or disprove a hypothesis.
C, Proteins is the correct answer
Number of people and Land area
divide them to find population density