The abundance of a species population within its habitat is called :

Options

A. Absolute density
B. Regional density
C. Relative density
D. Niche density

Answer

To solve the question regarding the abundance of a species population within its habitat, we need to analyze the options provided and understand the definitions associated with each term.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that describes the abundance of a species population within its habitat.

2. **Analyzing the Options**:
- **Absolute Density**: This refers to the total number of individuals of a species per unit area or volume. It does not specifically refer to a single habitat or species.
- **Regional Density**: This term typically refers to the density of a species across a broader region, not confined to a specific habitat.
- **Relative Density**: This is the density of one population in relation to another population, which does not focus on a single species in its habitat.
- **Niche Density**: This term, also known as ecological density, refers to the specific part of a habitat that is occupied by individuals of a single species. It considers the limitations of food, shelter, and other ecological factors.

3. **Identifying the Correct Answer**: Given the definitions, **Niche Density** is the correct term that describes the abundance of a species population within its specific habitat.

4. **Conclusion**: Therefore, the answer to the question is **Niche Density**.

### Final Answer:
The abundance of a species population within its habitat is called **Niche Density**.

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