Answer: It absorbs light.
Explanation: Chlorophyll is a pigment inside of all trees and plants. Plants absorb light, if the chlorophyll is green, then it will change the plant, and make it look green. It can change depending on the day, and temperature. If it is fall, the leaves cannot eat, and change to red. If the temperature is normal, say 90 degrees, the leaves are healthy, and eat. This helps them stay green.