Question

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

• A. Alien species invasion
• B. Co-extinctions
• C. Habitat loss and fragmentation
• D. Over-exploitation

Answer 1

The correct option is C

Habitat loss and fragmentation

The correct option is C.

Explanation of the correct answer:

1. Habitat loss and fragmentation is the most important cause of extinction.
2. Habitats are broken up into smaller fragments due to human activities.
3. Thus, species requiring larger areas and migratory habits are affected.
4. This leads to a decline in population.

Explanation of the incorrect options:

Option A:

1. Upon introduction, alien species may turn invasive and cause the decline of indigenous species.
2. It is not the largest cause of extinction.

Option B:

1. When a species becomes extinct, the plant and animal species associated with it also become extinct.
2. This is an obligatory form of extinction.
3. It is not the largest cause of extinction.

Option D:

1. When human needs turn into greed, degradation and extinction of natural resources occur.
2. It is not the largest cause of extinction.

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