"The Evil Quartet" is sobriquet used to describe

Options

A. four major causes of biodiversity losses
B. four major causes of forest loss
C. four major causes of air population
D. four major causes of population explosion

Answer

### Step-by-Step Solution:

1. **Understanding the Term "Evil Quartet":**
- The term "Evil Quartet" refers to a specific set of four factors that contribute to biodiversity loss. The word "quartet" indicates that there are four elements involved.

2. **Identifying the Context:**
- The context of the term is related to environmental science and conservation biology, specifically focusing on the causes of biodiversity loss.

3. **Listing the Four Causes:**
- The Evil Quartet includes the following four major causes of biodiversity loss:
1. **Over-exploitation:** This refers to the excessive use of natural resources, such as overfishing, overhunting, and overgrazing, leading to the depletion of species.
2. **Loss of Habitat:** This is caused by activities such as deforestation, urbanization, and natural disasters, which destroy the natural environments where species live.
3. **Introduction of Exotic or Alien Species:** This involves the introduction of non-native species that can outcompete, prey on, or bring diseases to native species, disrupting local ecosystems.
4. **Co-extinction:** This occurs when the extinction of one species leads to the extinction of another species that is dependent on it for survival, often seen in mutualistic relationships.

4. **Conclusion:**
- The Evil Quartet specifically describes the four major causes of biodiversity loss. Therefore, the correct answer to the question is that "The Evil Quartet" refers to the four major causes of biodiversity loss.

### Final Answer:
The Evil Quartet is a term used to describe the four major causes of biodiversity loss.

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