Most plants produce their own energy from sunlight. To store energy, these plants need sunlight, chlorophyll, water, and carbon dioxide. Other plants ,called parasites and saprophites, have no chlorophyll and steal their food from other plants. Other plants catch insects for food. Examples are venus flytrap, sundew plant and pitcher plant. If you're looking for a different improved answer look here!! Well plants need oxygen, carbon dioxide, sunlight, glucose, and water. See, this is what happens. The sun gives the plant energy, water also helps the plant grow, carbon dioxide is on the leaves, and the oxygen is released. Notice chlorophll is on the plant