Why are certain amino acids called essential amino acids

The human body uses amino acids to produce proteins, perform critical metabolic functions in the formation of other molecules and to produce energy. Some amino acids are synthesized by the human body, but the essential amino acids must be obtained from food.

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

explanation:

mark brainliest and have a great day!

im not intirely sure but i think the anwser is d relative humidity