Answer:
C. sunlight
Explanation:
Light is the most important ecological factor affecting plant growth. Photosynthesis is one of the most important processes on the planet. It's the process by which green, chlorophyll-containing plants create food from sunlight, carbon dioxide, and water. Photosynthesis is the reason that the sun's energy is able to spark life on Earth. Plants gain the sun's energy, and those plants are then eaten by animals.
