Topic: Biodiversity: concept, patterns, importance, loss· Ecology and Environment

Among 'The Evil Quartet', which one is considered the most important cause driving extinction of species?

1. Co-extinctions

2. Habitat loss and fragmentation

3. Over exploitation for economic gain

4. Alien species invasions

Doubtly Asked 30 Oct 2026 NEET UG 2023 Practice test neet Save WhatsApp Report

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Answer: 2. Habitat loss and fragmentation

Key idea: Of the four causes in the "Evil Quartet", habitat loss and fragmentation is the most important driver of species extinction.

The other three, over-exploitation, alien species invasions and co-extinctions, matter but are less dominant. The tropical rainforest being reduced is a typical example of habitat loss.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Among 'The Evil Quartet', which one is considered the most important cause driving extinction of species?

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