The phenomenon of sulphur shower in pine forest is due to

Options

A. dispersal of winged pollens of Pinus
B. dispersal of winged seeds of Pinus
C. bursting of thrid year female cone of Pinus
D. none of the above

Answer

### Step-by-Step Solution:

1. **Understanding the Context**: The question asks about the phenomenon known as the "sulphur shower" that occurs in pine forests. This phenomenon is related to the reproductive process of pine trees, specifically the Pinus species.

2. **Identifying the Pollination Period**: Pollination in Pinus typically occurs during the months of March and April. This is a critical time for the release of pollen grains.

3. **Characteristics of Pine Pollen**: The pollen grains of Pinus are described as yellow in color and winged. These characteristics are important because they facilitate the dispersal of pollen through the air.

4. **Pollen Dispersal Mechanism**: During the pollination period, a large quantity of pollen grains is released into the air. The wind carries these winged pollen grains, leading to a significant accumulation of pollen in the environment.

5. **Resulting Phenomenon**: As a result of this prolific release of pollen, the air becomes saturated with these yellow pollen grains, which eventually settle on the forest floor, creating a yellow deposit. This phenomenon is referred to as the "sulphur shower."

6. **Analyzing the Options**: The question provides several options regarding the cause of the sulphur shower:
- Dispersal of winged pollens of Pinus (Correct)
- Dispersal of winged seeds of Pinus (Incorrect)
- Busting of third-year female cone of Pinus (Incorrect)
- None of the above (Incorrect)

7. **Conclusion**: The correct answer is that the sulphur shower in pine forests is due to the dispersal of winged pollens of Pinus.

### Final Answer:
The phenomenon of sulphur shower in pine forest is due to the dispersal of winged pollens of Pinus.

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