The term PROTEIN means. __ An essential nutrient that helps insulates the body and store energy. An essential nutrient that is the most readily available energy source for the body. An essential nutrient that helps the body grow, build, and repair tissue. An essential nutrient that comes in powder form and helps your hair change colors.

## Step 1<br />The problem is asking for the correct definition of the term "PROTEIN". The term "PROTEIN" refers to a type of nutrient that is essential for the body. <br /><br />## Step 2<br />Proteins are not primarily used for insulation or energy storage, nor are they a readily available energy source for the body. They also do not come in powder form to change hair colors.<br /><br />## Step 3<br />Proteins are essential for the body's growth, building, and repairing tissues. They are the building blocks of the body and are necessary for the structure, function, and regulation of the body's tissues and organs.