There are four major causes of losses of biodiversity and is also called.

Options

A. Alpha diversity
B. Beta diversity
C. Gamma diversity
D. The evil quartet

Explanation

**Step-by-Step Solution:**

1. **Identify the Major Causes of Biodiversity Loss:**
The four major causes of biodiversity loss are:
- **Habitat Destruction:** This refers to the loss of natural habitats due to human activities such as deforestation, urbanization, and agriculture.
- **Pollution:** Pollution from industrial, agricultural, and urban sources can harm ecosystems and the species that inhabit them.
- **Invasion of Exotic Species:** This involves the introduction of non-native species that can outcompete, prey on, or bring diseases to native species, disrupting the local ecosystem. An example is the water hyacinth in India.
- **Overexploitation:** This refers to the unsustainable harvesting of species, such as overfishing or excessive hunting, which can lead to population declines and extinction.

2. **Understand the Terminology:**
The four causes of biodiversity loss are collectively referred to as the "Evil Quartet." This term highlights the significant threats these factors pose to biodiversity.

3. **Conclusion:**
Therefore, the four major causes of biodiversity loss are habitat destruction, pollution, invasion of exotic species, and overexploitation, which are collectively known as the "Evil Quartet."

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