Question

every fall, forests transform into vibrant displays of red, orange, and yellow, a phenomenon driven by environmental changes. as days shorten and temperatures drop, trees receive less sunlight, triggering a shift in their biological processes. this change signals trees to prepare for winter dormancy, reducing the production of chlorophyll, the green pigment responsible for photosynthesis. the absence of chlorophyll reveals other pigments that were present in the leaves all along but masked by green. carotenoids produce yellow and orange hues, while anthocyanins create reds and purples. these pigments become visible as chlorophyll breaks down, painting the landscape with stunning colors. the specific colors depend on the tree species and weather conditions, with sunny days and cool nights enhancing the vibrancy. this transformation has broader effects on the ecosystem. as leaves change color, trees conserve energy by shedding them, reducing water loss during winter. the fallen leaves decompose, enriching the soil with nutrients that support new growth in spring. this cycle ensures the forests health and sustainability, benefiting plants and animals alike. the visual spectacle of fall foliage also impacts human activities. it draws tourists to regions like new england, boosting local economies through festivals and outdoor recreation. however, it serves as a reminder of natures rhythms, showing how environmental cues drive biological changes. the changing leaves are both a scientific marvel and a seasonal gift. what kind of structure is used in the article? cause & effect problem & solution compare & contrast

Explanation:

The article first describes environmental changes (shorter days, lower temperatures, less sunlight) as causes. These cause trees to change their biological processes like reducing chlorophyll production. The absence of chlorophyll reveals other pigments (effect). Also, the color - change of leaves has effects on the ecosystem and human activities. So it's a cause - and - effect structure.

Answer:

cause & effect