Characters of a populations
I. proportion of reproducting age group is higher than the individuals in pre-reproductive age group
II. Number of post-reproductive individuals are moderate
III. Declining or diminshing population
Above characters shown indicates which type of age pyramid ?

Options

A. bell-shaped age pyramid
B. triangular age pyramid
C. sphere-shaped age pyramid
D. Urn-shaped age pyramid

Answer

To determine which type of age pyramid is represented by the given characteristics of a population, we will analyze each characteristic step by step.

### Step 1: Analyze the Characteristics
1. **Proportion of Reproductive Age Group is Higher than Pre-Reproductive Age Group**: This indicates that there are more individuals in the reproductive age group compared to those in the pre-reproductive age group. This is a key indicator of a declining population because if the reproductive age group is higher, it suggests that the population may not be growing significantly, as there are fewer individuals in the younger age group to replace them.

2. **Number of Post-Reproductive Individuals are Moderate**: A moderate number of post-reproductive individuals suggests that there is a balanced distribution in the older age group, which is typical in a declining population. This means that while there are some older individuals, they are not overwhelming the population structure.

3. **Declining or Diminishing Population**: This characteristic directly states that the population is decreasing. A declining population is typically represented by an age pyramid that is wider at the top (older individuals) and narrower at the bottom (younger individuals).

### Step 2: Identify the Type of Age Pyramid
Based on the analysis of the characteristics:
- The first characteristic indicates a higher reproductive age group compared to pre-reproductive, which is a sign of a declining population.
- The second characteristic supports this by indicating a moderate number of post-reproductive individuals.
- The third characteristic explicitly states that the population is declining.

### Conclusion
The characteristics given in the question indicate that the type of age pyramid is **declining**. This is often represented as an **inverted or urn-shaped pyramid**, where the base (pre-reproductive age group) is smaller than the middle (reproductive age group), and the top (post-reproductive age group) is moderate.

### Final Answer
The age pyramid represented by the given characteristics is a **declining age pyramid**.

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