Living things in the environment such as plants, animals, and bacteria are biotic factors. Biotic factors also include once-living parts such as dead leaves on the forest floor. Abiotic factors are nonliving aspects of the environment such as sunlight, temperature and water. One important abiotic factor is soil.
I am going to assume it mean what i think it does and say <span>A) Predation</span>
Answer: first 2 statements ie. It is essential that our diet provides these amino acids.
There are 20 essential amino acids.
All life is based on the chemical element cabon. It is essential to life.
