The correct answer is:
Proteins
1. Proteins are molecules made up of amino acids that play a crucial role in forming cells and tissues in the body.
2. They are essential for the growth, repair, and maintenance of cells, as well as for the protection of organs.
3. Proteins also have various functions in the body such as serving as enzymes, antibodies, and hormones.
Therefore, proteins are the macronutrient that is primarily responsible for forming cells and protecting organs in the body.
