Which of the following can be threats to the biodiversity of a geographical area? 1. Global warming 2. Fragmentation of habitat 3. Invasion of alien species 4. Promotion of vegetarianism Select the correct answer using the codes given below:
- A1, 2 and 3 onlyCorrect
- B2 and 3 only
- C1 and 4 only
- D1, 2, 3 and 4
Explanation
The correct answer is A because the first three factors directly contribute to the loss of biodiversity while the fourth does not.
- Global warming changes climatic conditions, leading to habitat loss and shifts in species distribution that many organisms cannot survive.
- Fragmentation of habitat occurs when large habitats are broken into smaller, isolated patches due to human activities like road building, which restricts animal movement and reduces genetic diversity.
- Invasion of alien species involves non native species outcompeting local flora and fauna for resources, often leading to the extinction of indigenous species.
- Promotion of vegetarianism is generally considered a measure to reduce the ecological footprint and pressure on land and water resources. It is not a threat to biodiversity; rather, it can help conserve it by reducing the demand for intensive livestock farming.
Therefore, only statements 1, 2, and 3 are threats to biodiversity.

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