The niche of a population is defined as

Options

A. (a) Set of condition that interacts
B. (b) Place where it lives and it interactions with envirnoment
C. (c) Set of conditions and resources it uses
D. (d) Geographical area that it covers

Answer

### Step-by-Step Solution:

1. **Understanding the Concept of Niche**:
- The niche of a population refers to its ecological role within an ecosystem. It encompasses how a species interacts with its environment, including both biotic (living) and abiotic (non-living) factors.

2. **Components of a Niche**:
- A niche includes several components:
- **Habitat**: The physical environment where the species lives.
- **Resources**: The food, water, and other materials the species utilizes.
- **Interactions**: How the species interacts with other organisms, including competition, predation, and symbiosis.
- **Behavior**: The actions and responses of the species in relation to its environment and other organisms.

3. **Competitive Exclusion Principle**:
- According to this principle, two species cannot coexist in the same niche if they compete for the same resources. This highlights the importance of niche differentiation.

4. **Evaluating the Options**:
- Now, let's analyze the provided options:
- **A**: Set of conditions that interacts - This is vague and does not fully capture the essence of a niche.
- **B**: Place where it lives and its interaction with the environment - This option includes both habitat and interactions, making it a strong contender.
- **C**: Set of conditions and resources it uses - This focuses on resources but lacks mention of habitat and interactions.
- **D**: Geographical area that it covers - This is more about habitat and does not encompass the full concept of a niche.

5. **Choosing the Most Appropriate Answer**:
- Among the options, **B** is the most comprehensive as it encompasses both the habitat and the interactions of the species with its environment, which are critical aspects of a niche.

### Final Answer:
The niche of a population is best defined as **B: Place where it lives and its interaction with the environment**.

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