Humid tropical rain forests have extraordinary biological diversity

Question

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The extraordinary biological diversity of humid tropical rain forests is due to local factors such as varying soil fertility and topography. These factors create a range of microhabitats that support different plant species and, in turn, attract a variety of animals and insects. The abundance of nutrient minerals in tropical soils (A) may contribute to plant growth, but it is not the sole reason for biological diversity in the rainforest. Human intervention (B) can introduce new species, but it does not explain the already existing diversity. Pollinators (C) are important for plant reproduction but do not account for the vast array of plant species in the rainforest. Photosynthesis (E) is a fundamental process for plant growth but does not correlate with the high levels of biodiversity in the rainforest.

Humid Tropical Rain Forests Have Extraordinary Biological Diversity