A balanced diet is important to provide the body with all the necessary nutrients to ensure physiological functioning. what is the name of the process where new organic molecules are synthesized?

The answer would be anabolism.

There is two kinds of metabolism: catabolism and anabolism. Anabolism is a process of making a new bigger molecule from many smaller molecules. The example of this process would be the synthesis of proteins from amino acids.

Catabolism is the opposite of anabolism. It breaks down a big molecule to produce many smaller molecules.