Answer:
Plant uses what it takes in to manufacture food and energy for itself.
Step-by-step explanation:
Plant basically takes in water and carbon dioxide. This is in the presence of sunlight as catalyst. And the presence of a colour pigment in the leaf - chloroplast, which houses the chlorophyll.
The process by which plant combine all of the above to arrive at its own food is simply referred to as Photosynthesis.
Through photosynthesis, plant manufacture its own food, which is majorly glucose, and also releases Oxygen as a by-product. The glucose this produced represent one of the simplest unit of carbohydrates. Thus, a direct source of energy is generated which ensure plants can conveniently meets its individual component parts need like - growth, reproduction, excretion, react to stimuli and so on.