A large regional unit characterised by a specific flora and fauna is called

Options

A. biome
B. Biosphere
C. Ecosystem
D. Landscape

Answer

To answer the question "A large regional unit characterised by a specific flora and fauna is called", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking for a term that describes a large area defined by its unique plant (flora) and animal (fauna) life.

2. **Identifying Key Terms**: The key terms here are "large regional unit," "specific flora," and "specific fauna." This indicates that we are looking for a term that encompasses both the types of plants and animals found in a particular area.

3. **Reviewing Possible Options**: The video transcript mentions several terms:
- **Biome**: A large naturally occurring community of flora and fauna occupying a major habitat.
- **Biosphere**: The global sum of all ecosystems, encompassing all living organisms and their environments.
- **Ecosystem**: A community of living organisms and their physical environment interacting as a system.
- **Landscape**: A region that includes various ecosystems and their interactions.

4. **Analyzing Each Option**:
- **Biome**: This term specifically refers to large areas characterized by distinct plant and animal groups, making it the most suitable choice for the question.
- **Biosphere**: This term refers to the global ecosystem and is too broad for the question.
- **Ecosystem**: This term refers to interactions within a specific community and is not necessarily large or regional.
- **Landscape**: This term refers to a pattern of ecosystems and is also not specific to flora and fauna.

5. **Conclusion**: The most appropriate term that fits the description of a large regional unit characterized by specific flora and fauna is **Biome**.

### Final Answer:
A large regional unit characterised by a specific flora and fauna is called a **Biome**.