The role of an organism in ecological system is known as

Options

A. Habitat
B. Herbivory
C. Niche
D. Interaction.

Answer

To answer the question "The role of an organism in an ecological system is known as," we need to analyze the options provided: habitat, herbivory, niche, and interaction.

### Step-by-Step Solution:

1. **Understanding the Options**:
- **Habitat**: This refers to the natural environment in which an organism lives. It describes the physical space and conditions that support the organism, but it does not define the role of the organism within the ecosystem.
- **Herbivory**: This term describes the dietary practice of organisms that consume plants. While it indicates a type of feeding behavior, it does not encompass the broader role of an organism in its ecosystem.
- **Niche**: This term specifically refers to the role or function of a species within its ecosystem. It includes how the organism interacts with other organisms, the type of food it consumes, its habitat, and its contribution to the energy flow and nutrient cycling in the environment.
- **Interaction**: This term generally refers to the ways in which organisms communicate or engage with one another, but it does not define the specific role of an organism in its ecological context.

2. **Identifying the Correct Answer**:
- Based on the definitions, the term that best describes the role of an organism in an ecological system is **niche**. The niche encompasses all aspects of how an organism lives, including its habitat, its interactions with other organisms, and its role in the ecosystem.

3. **Conclusion**:
- Therefore, the correct answer to the question is **niche**.