Population density is the population per unit ……….

Options

A. area
B. land area
C. water area
D. desert area

Answer

To solve the question "Population density is the population per unit ……….," we will analyze the options provided and understand the concept of population density.

### Step-by-Step Solution:

1. **Understanding Population Density**:
- Population density refers to the number of individuals of a species living in a specific area. It is a measure that helps in understanding how crowded or sparse a population is in a given habitat.

2. **Identifying the Options**:
- The options given are:
- Option 1: Area
- Option 2: Land area
- Option 3: Water area
- Option 4: Desert area

3. **Analyzing Each Option**:
- **Option 1: Area**: This is a general term that can refer to any geographical space.
- **Option 2: Land area**: This specifies that the population density is being measured on land.
- **Option 3: Water area**: This specifies that the population density is being measured in aquatic environments.
- **Option 4: Desert area**: This is a specific type of land area but is too narrow to encompass all possible habitats.

4. **Selecting the Most Appropriate Option**:
- Since population density can be measured in various habitats (land, water, etc.), the most inclusive and correct answer is **Option 1: Area**. This encompasses all types of environments where populations can exist.

5. **Conclusion**:
- Therefore, the correct answer to the question "Population density is the population per unit ………." is **Area**.

### Final Answer:
Population density is the population per unit **Area**.