When a substance is added to meat, amino acids are produced. What is this substance?

A) a hormone
B) an enzyme
C) an oil
D) water

The answer is B an enzyme ！

Explanation:

Meat is a good source of protein because it is the main component. Hormones, oil, and water won't really produce a substance when added to meat.  Enzymes break down different substances. The right enzyme can break down proteins. The monomer, or building block, of protein is an amino acid. Therefore, when a protein is broken down, amino acids are produces.

So, from the information above, we can assume that the substance is an enzyme. Enzymes break down meat/protein into amino acids.

the supermassive black hole is in the middle of the galaxy.

straight or amphibians are homeothermic to thermal