Help please-Why are we all so different and all living organisms different even though there are only four bases that code for all the genes

We can plant more trees and plants.

U. life is what you go through to become a better person. it makes you stronger, wiser, and more creative. it can be hard but its ok. because i believe everyone was put here for a reason. whether or not you know that reason you should always look towards the future and trust in god for a better tomorrow.be safe and blessed

D. the maximum number of species that can live in an ecosystem.

Whatis the question here