Biology

The correct answer is A.Is the main source of energy for the body.

Carbohydrates are the body's primary and most readily available source of energy. When consumed, carbohydrates are broken down into glucose, which is used by cells to produce energy, particularly for activities requiring quick bursts of energy like exercise or brain function.

Here’s why the other options are incorrect:

B.Helps to build and repair body tissue: This is the role of protein...