Red pigments (anthocyanins) form in autumn to protect leaves from excess sunlight.
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Science
Leaves turn red in autumn primarily due to the formation of anthocyanin pigments. These pigments help protect the leaves from sun damage and facilitate better nutrient recovery before the leaves fall off. Unlike yellow pigments which are always present but masked by chlorophyll, red pigments are produced in response to changing environmental conditions like sunlight and temperature. This natural phenomenon highlights the complexity and adaptability of plant life in changing seasons.
