Which of the following parameters are responsible for increasing the population ?

Options

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

Answer

To solve the question "Which of the following parameters are responsible for increasing the population?", we can follow these steps:

### Step 1: Understand the Terms
- **Natality**: This refers to the number of live births in a population over a specific period. Higher natality means more individuals are being born, which contributes to population growth.
- **Mortality**: This refers to the number of deaths in a population over a specific period. Higher mortality means more individuals are dying, which contributes to a decrease in population.
- **Immigration**: This is the movement of individuals into a population from another area. When people immigrate to a region, they increase the population of that area.

### Step 2: Analyze Each Option
1. **Option 1: Natality and Mortality**
- Natality increases population, but mortality decreases it. Therefore, this option is incorrect.

2. **Option 2: Mortality and Natality**
- Similar to option 1, this includes mortality which decreases population. Thus, this option is also incorrect.

3. **Option 3: Natality and Immigration**
- Both natality (births) and immigration (incoming individuals) contribute to an increase in population. Therefore, this option is correct.

4. **Option 4: Mortality and Immigration**
- Mortality decreases population, while immigration increases it. Since one parameter decreases and the other increases, this option is incorrect.

### Step 3: Conclusion
The correct answer is **Option 3: Natality and Immigration**, as both parameters are responsible for increasing the population.