Which of the following regions has the greatest biodiversity?

ATropical rainforests ✓ Correct

BThe Arctic region

CThe sub-tropical region

DNone of the above

Correct answer: (A) Tropical rainforests

Explanation

Tropical rainforests hold the greatest biodiversity, packed with countless plant and animal species.

The Arctic region is cold and species-poor with a short growing season.

The sub-tropical belt is rich but falls short of equatorial forest diversity.

Rejecting all choices ignores the clearly richest biome given.

Warm, wet and stable equatorial conditions allow dense layering of niches and life-forms.

Rainforests cover a small share of land yet host over half of all known species.

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