Final answer:
Nutrient storage is important for providing a continuous supply of energy, especially for organs like the brain. The liver and muscles are the primary sites of nutrient storage in the body.
Step-by-step explanation:
Nutrient storage is important because it allows the body to have a continuous supply of energy, especially for organs like the brain that require a constant supply of glucose. Excess nutrients that are consumed but not immediately used are stored for later use. The primary sites of nutrient storage in the body are the liver and muscles. The liver stores nutrients, including glycogen, and releases them as needed by the body, while the muscles store glycogen for immediate energy needs during exercise.