How is pollination carried out in water plants?

Explanation

### Step-by-Step Solution:

1. **Understanding Pollination in Water Plants**: Pollination in water plants involves the transfer of pollen grains from male reproductive structures to female reproductive structures, facilitated by water.

2. **Role of Water**: In aquatic environments, water serves as the primary medium for the movement of pollen. It acts as a transport agent, allowing pollen grains to float and move through the water.

3. **Example of Valisneria**: A well-known example of a water plant that undergoes pollination through water is Valisneria. This plant has both male and female forms.

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