Threats to Biodiversity · NCERT Biology

Which human activity is considered the most important cause driving animals and plants to extinction?

  1. Introduction of alien species into native ecosystems
  2. Co-extinction of interdependent organisms
  3. Habitat loss and fragmentation
  4. Over-exploitation of economically valuable species
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Correct answer: Habitat loss and fragmentation

Habitat loss and fragmentation is the primary driver of biodiversity loss. When large habitats are broken into small fragments due to human activities, mammals and birds requiring large territories and certain animals with migratory habits are badly affected.

Difficulty: Medium Question 2 of 20

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