I. Rapid decline in death rate.
II. Rapid increase tin MMR and IMR
III. Rapid decline in MMR and IMR
IV. Increase in number of people in the reproductive age group
V. Rapid increase in the death rate
What are the causes of higher population growth?

Options

A. All
B. I,II,IV
C. I,III, IV
D. III,IV,V

Answer

To determine the causes of higher population growth, we will analyze the five points provided in the question.

### Step-by-Step Solution:

1. **Rapid Decline in Death Rate**:
- A rapid decline in the death rate means that fewer people are dying. This leads to an increase in the overall population because more individuals are surviving to adulthood and beyond.
- **Conclusion**: This is a cause of higher population growth.

2. **Rapid Increase in MMR and IMR**:
- Maternal Mortality Rate (MMR) refers to the number of mothers dying during childbirth, while Infant Mortality Rate (IMR) refers to the number of infants dying shortly after birth.
- An increase in either MMR or IMR would mean more deaths, which would contribute to a decrease in population growth.
- **Conclusion**: This is NOT a cause of higher population growth.

3. **Rapid Decline in MMR and IMR**:
- A rapid decline in both MMR and IMR indicates that fewer mothers and infants are dying during childbirth. This leads to more surviving births, thus contributing to population growth.
- **Conclusion**: This is a cause of higher population growth.

4. **Increase in Number of People in the Reproductive Age Group**:
- An increase in the number of individuals in the reproductive age group means that there are more people capable of having children. This directly contributes to an increase in birth rates and, consequently, population growth.
- **Conclusion**: This is a cause of higher population growth.

5. **Rapid Increase in Death Rate**:
- A rapid increase in the death rate would lead to more deaths in the population, which would decrease the overall population size.
- **Conclusion**: This is NOT a cause of higher population growth.

### Final Conclusion:
The causes of higher population growth from the options provided are:
- I. Rapid decline in death rate (Correct)
- III. Rapid decline in MMR and IMR (Correct)
- IV. Increase in number of people in the reproductive age group (Correct)

Thus, the correct options are I, III, and IV.