The students at every stage of education are expected to pass the examination after finishing the whole course. But it has been found that in general practice many students are not able to pass the examinations in one class or in more than one class within the prescribed period.
Everything-everything indeed, we use and consume—the food we eat, the clothes we wear, the house we live in — are all essentially made of materials and energy drawn from environment—the earth's crust and surface, atmosphere or water. We never get something from nothing.
Most of the food that we eat is cooked to make it easily digestible and good to eat. Cooking involves heating the food items and addition of salt, sugar, oil and spices.