Threats to biodiversity come from

Options

A. Habitat loss
B. Over exploitation
C. Intensive agriculture
D. All of the above

Answer

### Step-by-Step Solution:

1. **Understanding Biodiversity**:
- Biodiversity refers to the variety of life forms on Earth, including all plants (flora) and animals (fauna). It is essential for ecosystem stability and human survival.

2. **Identifying Threats to Biodiversity**:
- Threats to biodiversity can be defined as factors that pose danger to the variety of life forms. These threats can be natural or man-made.

3. **Habitat Loss**:
- Habitat loss is one of the primary threats to biodiversity. It occurs when natural environments are destroyed or altered, making it difficult for species to survive.
- This can happen due to:
- **Natural Causes**: Such as forest fires or natural disasters.
- **Human Activities**: Such as deforestation for agriculture, urban development, or industrial purposes.

4. **Overexploitation**:
- Overexploitation refers to the excessive use of natural resources. As the human population grows, the demand for resources such as food, water, and land increases, leading to:
- Overfishing, hunting, and harvesting of plants and animals beyond sustainable levels.
- This can result in the depletion of species and disrupt ecosystems.

5. **Intensive Agriculture**:
- Intensive agriculture involves the high-input farming practices that aim to maximize crop yield. This can lead to:
- Loss of natural habitats as land is converted for farming.
- Use of pesticides and fertilizers that can harm non-target species and degrade soil health.
- Monocultures that reduce genetic diversity among crops and increase vulnerability to pests and diseases.

6. **Conclusion**:
- All the aforementioned factors—habitat loss, overexploitation, and intensive agriculture—are significant threats to biodiversity. Therefore, the answer to the question is "All of the above."