Answer: D
Explanation:
Many unicellular organisms live in bodies of water and must move around to find food. Most often, they must obtain nutrients by eating other organisms. Plant-like protists, and some types of bacteria, can make their own food through photosynthesis.
B. They are determined by I, AB, A, or B
Population and nutrients, This is because if you have a large population then you must need a certain amount of nutrients to suit the population
I THINK!!! a. but i could be wrong sry if i am