Final answer:
The nutrient that helps make new cells and rebuilds tissue is protein, an essential component for growth, repair, and maintenance of the body's tissues.
Step-by-step explanation:
Nutrients for Cell Growth and Tissue Repair
The nutrient that is specifically involved in making new cells and rebuilding tissue is protein. Proteins are essential for the growth, repair, and maintenance of body tissues. They are made up of amino acids, which are used to build the various proteins your body needs. These include enzymes for metabolic pathways, antibodies for the immune system, and the structural components of cells. It's not just muscle; proteins play critical roles in the cells of all tissues including skin, hair, and internal organs.
Vitamins and minerals are also essential nutrients that play key roles in maintaining healthy body functions but do not directly contribute to the building of tissue in the way proteins do. Therefore, the correct answer to the question is option 1) Protein.
While carbohydrates are primarily used to provide energy, they do not rebuild tissue. Minerals, on the other hand, contribute to structural components of the body (such as calcium in bones) and are involved in a range of body processes but are not the main nutrient for tissue synthesis.