The correct answer is option D, that is, metabolism.
Metabolism is a term used to signify mainly towards the dissociation of food and its succeeding conversion into energy required by an individual's body. It is something, which comprises both anabolism and catabolism that are the buildup and breakdown of components.
The procedure by which the body transforms what one eats into energy is known as metabolism. At the time of this complex biochemical phenomenon, the calories in beverages and food are amalgamated with oxygen to discharge the energy one requires to work. Therefore, a person having a high amount of energy will have a high metabolism.
Inside the seed there are is an embryo the baby plan and cotyledons. When the seed begins to grow, one part of the embryo becomes the plant while the other part becomes the root of the plant.