Different biomes are formed due to annual variations in ________over the earth's surface.

Options

A. temperature
B. precipitation
C. incident solar radiation
D. all of these

Answer

To answer the question "Different biomes are formed due to annual variations in ________ over the earth's surface," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Biomes**:
- A biome is a large ecological area on the earth's surface, with flora and fauna (plants and animals) adapting to their environment. Biomes are characterized by their climate, vegetation, and wildlife.

2. **Identifying Key Factors**:
- The formation of biomes is influenced by various environmental factors. The primary factors include:
- **Temperature**: The average temperature in an area can affect the types of plants and animals that can survive there.
- **Precipitation**: The amount and distribution of rainfall influence the types of vegetation that can grow, which in turn affects the animal species present.
- **Incident Solar Radiation**: The amount of sunlight received in an area can also impact the climate and the types of organisms that thrive.

3. **Considering Annual Variations**:
- Biomes are formed due to annual variations in these factors. For example, areas with high rainfall and warm temperatures may support tropical rainforests, while areas with low rainfall and high temperatures may lead to deserts.

4. **Evaluating the Options**:
- The options provided in the question are:
- Temperature
- Precipitation
- Incident solar radiation
- All of these
- Since all these factors contribute to the formation of different biomes, the correct answer must encompass all of them.

5. **Conclusion**:
- Therefore, the correct answer to the question is "All of these." This indicates that different biomes are formed due to annual variations in temperature, precipitation, and incident solar radiation over the earth's surface.

### Final Answer:
Different biomes are formed due to annual variations in **all of these** over the earth's surface.

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