HUMAN NUTRITION

Detailed explanation-1: -A food is something that provides nutrients. Nutrients are substances that provide: energy for activity, growth, and all functions of the body such as breathing, digesting food, and keeping warm; materials for the growth and repair of the body, and for keeping the immune system healthy.

Detailed explanation-2: -Foods contain a lot of stored chemical energy; when you eat, your body breaks down these foods into smaller components and absorbs them to use as fuel. Energy comes from the three main nutrients carbohydrates, protein, and fats, with carbohydrates being the most important energy source.

Detailed explanation-3: -As was stated above, the three functions of food are: nutrition absorption, satisfying psychological needs, and physical adjustment.