The main factor responsible for increase in population is/are

Options

A. decrease in maternal mortality rate
B. decrease in infant mortality rate
C. rate increase in life expectancy
D. All of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Population Increase**: The question asks for the main factors responsible for the increase in population. To answer this, we need to analyze the options provided.

2. **Evaluate Each Option**:
- **Option 1: Decrease in Maternal Mortality Rate (MMR)**: A decrease in MMR means fewer mothers are dying during childbirth. This leads to more mothers surviving to raise their children, contributing to population growth.
- **Option 2: Decrease in Infant Mortality Rate (IMR)**: A decrease in IMR indicates that more infants are surviving their early years. With fewer deaths among newborns, the population will naturally increase as more children survive to adulthood.
- **Option 3: Increase in Life Expectancy**: An increase in life expectancy means that people are living longer due to better healthcare and medical advancements. This results in a larger population as more individuals live into older age.

3. **Conclusion**: All the factors mentioned (decrease in MMR, decrease in IMR, and increase in life expectancy) contribute to the overall increase in population. Therefore, the correct answer is that all the above options are correct.

4. **Final Answer**: The main factor responsible for the increase in population is **all of the above options**.

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