Formation of tropical forests needs mean annual temperature and mean annual precipitation as

Options

A. `18 - 25^(@)C and 150 - 400 cm`
B. `5 - 15^(@)C and 50 - 100 cm`
C. `30 - 50^(@)C and 100 - 150 cm`
D. `5 - 15^(@)C and 100 - 200 cm`

Explanation

To answer the question about the formation of tropical forests in relation to mean annual temperature and mean annual precipitation, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Ecosystems**:
- Tropical forests are a type of ecosystem that consists of both biotic (living organisms) and abiotic (non-living elements) factors.

2. **Identifying Abiotic Factors**:
- The abiotic factors that influence the formation of tropical forests include temperature and precipitation.

3. **Mean Annual Temperature**:
- For tropical forests to thrive, the mean annual temperature must be within a specific range.
- The ideal temperature range for the formation of tropical forests is between **18°C to 25°C**.

4. **Mean Annual Precipitation**:
- In addition to temperature, the amount of rainfall is crucial for the growth of tropical forests.
- The mean annual precipitation required for tropical forests is typically between **150 cm to 400 cm**.

5. **Conclusion**:
- Therefore, the formation of tropical forests requires a mean annual temperature of **18°C to 25°C** and mean annual precipitation of **150 cm to 400 cm**.

### Final Answer:
The formation of tropical forests needs a mean annual temperature of **18°C to 25°C** and mean annual precipitation of **150 cm to 400 cm**.

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