Which of the given age pyramid reflects a stable human population ?

Options

A.
B.
C.
D.

Answer

To determine which age pyramid reflects a stable human population, we can analyze the characteristics of the provided age pyramids step by step.

### Step-by-Step Solution:

1. **Understand Age Pyramids**: Age pyramids are graphical representations of the age distribution of a population. They typically show the number of individuals in different age groups, separated by gender.

2. **Identify the Shape of the Pyramids**:
- **Urn-shaped Pyramid**: This shape indicates a stable population. It has a wider middle section, showing that the adult population is larger than the younger and older age groups.
- **Inverted Pyramid**: This shape indicates a declining population. It has a wider top and narrower base, suggesting fewer young individuals and a higher number of older individuals.
- **Erect Pyramid**: This shape indicates a growing or expanding population. It has a broad base, indicating a high birth rate with many children and fewer older individuals.

3. **Analyze the Given Options**:
- **Option 1 (Urn-shaped)**: This pyramid has fewer pre-reproductive individuals (children), a larger adult population, and fewer post-reproductive individuals (elderly). This indicates a stable population.
- **Option 2 (Inverted Pyramid)**: This pyramid shows a decrease in birth rates, indicating a declining population.
- **Option 3 and 4 (Erect Pyramids)**: These pyramids show a high number of children and fewer adults, indicating an expanding population.

4. **Conclusion**: The age pyramid that reflects a stable human population is the **urn-shaped pyramid** (Option 1).

### Final Answer:
The age pyramid that reflects a stable human population is **Option 1 (Urn-shaped pyramid)**.