In general, foods are made up of carbohydrates, proteins, and fats, each of which provide a different number of calories: 1  Carbohydrates provide 4 calories per gram. 2  Proteins provide 4 calories per gram. 3  Fats provide 9 calories per gram.
Importance of Water. Water is used for various important purposes: Water in Agriculture. Water plays the most important role in agriculture. Agriculture is impossible without irrigation throughout the crop season. Irrigation ensures proper plant growth.
Drinking to Your Health. Since water is such an important component to our physiology, it would make sense that the quality of the water should be just as important as the quantity. Therefore, your drinking water should always be clean and free of contaminants to ensure proper health and wellness.