Question

Which of the following is the most important cause for animals and plants being driven to extinction?

• A. Alien species invasion
• B. Habitat loss and fragmentation
• C. Drought and floods
• D. Economic exploitation.

Answer 1

The correct option is B

Habitat loss and fragmentation

The correct option is B.

Explanation of correct option:

1. The four major causes or ‘The Evil Quartet’ of biodiversity loss are habitat loss and fragmentation, over-exploitation, alien species invasions and co-extinctions.
2. Among these four reasons, habitat loss and fragmentation is the most important cause of the extinction of plants and animals.

Explanation of incorrect option:

Option A:

The decline or extinction of indigenous species of an area due to the introduction of alien species intentionally or unintentionally is known as alien species invasion.

Option C:

1. Drought and floods are not the major cause of the decline in population.
2. It is the natural resistance of nature to control the excessive growth in population.

Option D:

Economic exploitation is not a cause for a decline in population.

Final answer: Habitat loss and fragmentation is the most important cause of animals and plants being driven to extinction.