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Answer:
Most of the plants are green but during the fall or autumn they change to other colours such as yellow, red, and orange. This is because plants also contain other pigments such as carotenoids (yellow orange) and anthocyanins (mostly red). These other accessory pigments sit in the leaf along with the chlorophyll and they are the reason that leaves are many different shades of green. The green pigment covers them up for the most part in the summer, but in the fall, when the plants are beginning to go dormant in anticipation of the winter, the plant cells stop making chlorophyll, and the leaves lose their green colour. Without it, we can see the colours of the other pigments in the leaves.
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