Fungus because it is a living thing in its own right as opposd to a brain cell which is part of an organism.
Answer:
In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. The idea of natural selection is that traits that can be passed down allow organisms to adapt to the environment better than other organisms of the same species
B. subcutaneous skin layer
Answer:
It doesn't really matter either way they prolly going to shoot up a school. :/
Explanation:
Probably C. For example, you can tell how many amount of organism are in an ecosystem if you just check like a lot of animals live in hot climates while not many animals live in cold types of climates. I’m probably not making sense but I would put C.