Correct Option: A

Protein is required by the body for the growth, maintenance and repair of all cells. Protein is a major component of all muscles, tissues and organs and is vital for practically every process that occurs within the body such as metabolism, digestion and the transportation of nutrients and oxygen in the blood. When the proteins that we consume in our food are broken down through digestion into individual amino acids, these amino acids are then absorbed and reform in order to create new proteins that are then used by the body.