A population in which number of pre-reproductive individuals is very large, number of reproductive individuals is moderate while post-reproductive individuals are fewer. Which kind of age pyramid is represented by such a population ?

Options

A.
B.
C.
D. Cannot be determined

Answer

To determine the kind of age pyramid represented by a population where the number of pre-reproductive individuals is very large, the number of reproductive individuals is moderate, and the number of post-reproductive individuals is fewer, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Age Groups**:
- Pre-reproductive individuals: These are typically children and adolescents who have not yet reached reproductive age.
- Reproductive individuals: These are adults who are of childbearing age and actively contribute to population growth.
- Post-reproductive individuals: These are older adults who are beyond their reproductive years.

2. **Analyze the Population Structure**:
- In the given population, there is a large number of pre-reproductive individuals, indicating a young population.
- The moderate number of reproductive individuals suggests that there is a stable level of births occurring.
- The fewer post-reproductive individuals indicate that there are not many older individuals in the population.

3. **Visualize the Age Pyramid**:
- Age pyramids are graphical representations of the age distribution of a population.
- The base of the pyramid represents the pre-reproductive age group, the middle section represents the reproductive age group, and the apex represents the post-reproductive age group.

4. **Determine the Shape of the Pyramid**:
- Since the pre-reproductive group is very large, the base of the pyramid will be broad.
- The reproductive group is moderate, so the middle section will be narrower than the base but wider than the apex.
- The post-reproductive group is smaller, resulting in a narrow apex.

5. **Identify the Type of Age Pyramid**:
- An age pyramid with a broad base and a narrow apex is typically triangular in shape, indicating a growing or expanding population.
- This shape suggests that the population is likely to increase in the future as the large number of pre-reproductive individuals will transition into the reproductive age group.

6. **Conclusion**:
- Therefore, the age pyramid represented by the described population is an **upright or triangular age pyramid**, indicating an expanding population.

### Final Answer:
The kind of age pyramid represented by such a population is an **upright or triangular age pyramid**.

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