A large regional unit characterised by vegetation type and associated fauna found in a specific climatic zone is called:

Options

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

Answer

To solve the question, "A large regional unit characterised by vegetation type and associated fauna found in a specific climatic zone is called:", we will follow these steps:

### Step 1: Understand the Terms
We need to define the terms provided in the options: biome, biosphere, ecosystem, and landscape.

### Step 2: Define Each Term
1. **Biome**: A biome is a large regional unit characterized by specific climate conditions, vegetation types, and associated fauna. It represents a distinct ecological community adapted to the environment.

2. **Biosphere**: The biosphere is the global sum of all ecosystems. It includes all parts of the Earth where life exists, encompassing land, water, and the atmosphere.

3. **Ecosystem**: An ecosystem is a community of living organisms interacting with their physical environment (abiotic factors). It includes both biotic (living) and abiotic (non-living) components.

4. **Landscape**: A landscape refers to a mosaic of heterogeneous landforms and ecosystems. It represents a broader area that may include multiple ecosystems and biomes.

### Step 3: Analyze the Question
The question specifically asks for a term that describes a large regional unit defined by vegetation type and associated fauna within a specific climatic zone.

### Step 4: Compare Definitions
- **Biome** fits the description perfectly as it is defined by specific climate zones, vegetation types, and associated fauna.
- **Biosphere**, while it includes all life, does not specify a regional unit or climatic zone.
- **Ecosystem** refers to a smaller community and does not encompass the larger regional unit aspect.
- **Landscape** describes a variety of landforms and ecosystems but lacks the specificity of climate and vegetation.

### Step 5: Conclusion
Based on the definitions and analysis, the correct answer to the question is **Biome**.

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