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Multiple choice questions

Q.Biodiversity is richer in:

(a) Tropical Regions
(b) Polar Regions
(c) Temperate Regions
(d) Oceans
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Biodiversity is richest in tropical regions, because the warm, stable climate near the equator supports more species than the harsh conditions of polar or temperate zones.

The question asks where biodiversity is richer, and the answer is tropical regions. This is one of the most consistent patterns in nature, visible whether you look at forests, birds, insects, or flowering plants. Walk into a rainforest in the Amazon or the Western Ghats, and you will see more kinds of trees, butterflies, frogs, and birds in a single hectare than you would find in an entire temperate forest of similar size. The same holds for coral reefs, which are the tropical oceans' equivalent of rainforests.

Why does this happen? The key lies in climate. Tropical regions receive strong, direct sunlight all year round, which keeps temperatures warm and fairly constant. There is no harsh winter that forces organisms to hibernate, migrate, or die back. This means plants can photosynthesise and grow continuously, producing a large and steady supply of food. More food supports more animals, and the stable environment allows species to specialise in narrow niches — one bird might feed only on a certain fruit, another only on a particular insect. Over long periods, this specialisation leads to the evolution of many more distinct species. …

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