Birth rate is called:

Options

A. Mortality
B. Emigration
C. Immigration
D. Natality

Answer

To answer the question "Birth rate is called:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- We need to identify what each term in the options represents.
- Mortality refers to the number of deaths in a population.
- E-migration refers to the number of individuals leaving a habitat.
- I-migration refers to the number of individuals entering a habitat.
- Natality refers to the number of births in a population.

2. **Identifying the Correct Term**:
- Since the question specifically asks about "birth rate," we need to focus on the term that relates to births.
- From our understanding, natality is defined as the number of births during a given period in a population.

3. **Conclusion**:
- Therefore, the term that corresponds to "birth rate" is **natality**.

4. **Final Answer**:
- Birth rate is called **natality**.