Answer :
Light energy helps cells to grow and gives the body vital vitamins, such as vitamin C. Plants rely sun for photosynthesis, which with carbon dioxide, water and sugar create the plant to grow
Light energy comes from the sun. Without the sun, plants would not be able to perform photosynthesis. This means that the entire food chain would not be able to function, because herbivores, omnivores, carnivores, ect, would have nothing to eat. Without the sun's light, none of us would be here today, because we all rely on each other to survive. For more info, you could look up an energy pyramid to show why plants are so important.