Which type of age pyramid is obtained when the population is growing ?

Options

A. Bell-shaped pyramid
B. Um-shaped age pyramid
C. Triangular pyramid
D. square-shaped pyramid

Answer

To determine which type of age pyramid is obtained when the population is growing, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Age Pyramids**: Age pyramids are graphical representations of the age distribution of a population. They can indicate whether a population is growing, stable, or declining.

2. **Identify Types of Age Pyramids**: There are three main types of age pyramids:
- **Triangular Pyramid**: Characterized by a wide base and a narrow top, indicating a high number of young individuals (pre-reproductive) and fewer older individuals.
- **Bell-Shaped Pyramid**: Indicates a stable population where the number of individuals in the reproductive age group is similar to the pre-reproductive age group.
- **Urn-Shaped Pyramid**: Indicates a declining population, with more older individuals and fewer young individuals.

3. **Analyze the Triangular Pyramid**: In a triangular pyramid, the base (pre-reproductive age group) is larger than the reproductive age group, indicating that there are many children who will grow into the reproductive age group. This suggests that the population is likely to grow.

4. **Conclusion**: Since the triangular pyramid shows a higher number of young individuals compared to older individuals, it indicates a growing population. Therefore, the type of age pyramid obtained when the population is growing is the **triangular pyramid**.

### Final Answer:
The age pyramid obtained when the population is growing is the **triangular pyramid**.