I believe they cannot start with big trees and bushes because the there is not enough nutrients in the soil, so instead pioneer species pave the way for primary succession.
Answer:
B an animal that can live in fresh water
I guess it means “neck urself!” Lol. Nvm sorry. It probably means that they are gonna go get help from another or they are gonna fall and hit the water or maybe that they are gonna go help someone.
D.uracil is the nitrogen base bind with adenine
