It is the procedure by which the food is taken by the organism and used to generate energy for repair, growth, and maintenance, and then removing the waste substance from the body.
The components, which provide nutrition to living species are known as nutrients.
Two modes of nutrition are there, that is, autotrophic and heterotrophic modes of nutrition.
In autotrophic mode of nutrition, the organism produce their own food by utilizing water, sunlight, and carbon dioxide.
For example, plants.
In heterotrophic mode of nutrition, the organism depend on others for their food.
For example, both humans and animals exhibit heterotrophic mode of nutrition.