In terrestial habitats , temperature and rain fall conditions are influenced by

Options

A. photoperiodism
B. transpiration
C. thermoperiodism
D. translocation

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks how temperature and rainfall conditions in terrestrial habitats are influenced. We need to identify which of the given options (photoperiodism, transpiration, thermoperiodism, or translocation) has a significant impact on these climatic factors.

2. **Analyzing the Options**:
- **Option A: Photoperiodism**: This refers to the response of organisms to the length of day or night. While it affects flowering and growth, it does not directly influence temperature and rainfall.
- **Option B: Transpiration**: This is the process where plants lose water vapor through stomata. It plays a crucial role in regulating temperature and can influence local rainfall patterns by contributing to humidity in the atmosphere.
- **Option C: Thermoperiodism**: This refers to the response of organisms to temperature variations over a 24-hour period. While it relates to temperature, it does not directly affect rainfall.
- **Option D: Translocation**: This is the movement of nutrients and water within the plant. It is essential for plant health but does not influence temperature or rainfall conditions.

3. **Identifying the Correct Answer**: Based on the analysis, transpiration (Option B) is the most relevant process that influences temperature and rainfall conditions in terrestrial habitats. It increases with temperature and can decrease with rainfall, thus having a direct impact on climatic conditions.

4. **Conclusion**: Therefore, the correct answer to the question is **Option B: Transpiration**.