Organisms represented at the top of an age pyramid are

Options

A. Pre-reproductive
B. Reproductive
C. t-reproductive
D. Producers

Answer

To answer the question regarding the organisms represented at the top of an age pyramid, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Age Pyramid**:
- An age pyramid is a graphical representation that shows the distribution of various age groups in a population, typically divided by sex. It provides insights into the population structure and reproductive potential.

2. **Identifying the Sections of the Age Pyramid**:
- The age pyramid is divided into three main sections:
- **Pre-reproductive**: Individuals who are not yet mature enough to reproduce.
- **Reproductive**: Individuals who are capable of reproduction.
- **Post-reproductive**: Individuals who have surpassed their reproductive years.

3. **Analyzing the Top of the Age Pyramid**:
- The top section of the age pyramid represents individuals who are no longer capable of reproduction. This is known as the post-reproductive stage.

4. **Selecting the Correct Option**:
- Among the options provided (pre-reproductive, reproductive, T reproductive, and producers), the term that corresponds to the individuals at the top of the age pyramid is "T reproductive," which refers to post-reproductive individuals.

5. **Conclusion**:
- Therefore, the organisms represented at the top of an age pyramid are T reproductive (post-reproductive) individuals.

### Final Answer:
The organisms represented at the top of an age pyramid are T reproductive (post-reproductive) individuals.