Answer. Fats and oils are high energy foods. They are source of vitamins A, D and E. They are used to build brain cells, nerve cells and cell membranes. They are insoluble in water but soluble in organic solvents. The fats stored in the body are poor conductor of heat and electricity. Fats and oils are synthesized naturally by animals, plants and marine organisms.
(i) Animal fats are found in adipose tissue cells. Animals secrete milk from which butter and ghee are obtained. Butter and ghee are used for cooking and frying of food, for preparing bakery products and sweets.
(ii) Animal fats are used in soap industry
(iii) Plants synthesize oils and store them in seeds. Examples are sunflower oil, coconut oil, groundnut oil and corn oil. These oils are used as vegetable oils or ghee for cooking and other purposes.
(iv). Marine animals like salmon and whales are also source of oils. These oils are used as medicines, e.g., cod liver oil.