The impact of immigration on population density is:

Options

A. Negative
B. Both positive and negative
C. Neutralized by natality
D. Positive

Answer

To solve the question regarding the impact of immigration on population density, we can break down the concepts step by step.

### Step-by-Step Solution:

1. **Understanding Population Density**:
- Population density refers to the number of individuals living per unit area. It can be influenced by various factors.

2. **Factors Affecting Population Density**:
- There are four main factors that affect population density:
- **Natality (Birth Rate)**: This is the rate at which new individuals are born into a population. An increase in natality leads to an increase in population density.
- **Mortality (Death Rate)**: This is the rate at which individuals die in a population. An increase in mortality leads to a decrease in population density.
- **Immigration**: This refers to individuals moving into a population from outside. Immigration increases the population density as it adds more individuals to the area.
- **Emigration**: This refers to individuals moving out of a population. Emigration decreases the population density as it reduces the number of individuals in the area.

3. **Analyzing the Impact of Immigration**:
- Since immigration involves individuals moving into a population, it contributes positively to the overall population density. This means that as more people immigrate to an area, the density of the population in that area increases.

4. **Conclusion**:
- Therefore, the impact of immigration on population density is positive. This is because immigration adds to the population, increasing the density.

### Final Answer:
The impact of immigration on population density is **positive**.

---