In water hyacinth and water lily, pollination takes place by:

Options

A. Water currents only
B. Wind and water
C. Insects and water
D. Insects or wind

Answer

To determine how pollination occurs in water hyacinth and water lily, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Pollination**:
- Pollination is the process of transferring pollen grains from the anther (male part) of a flower to the stigma (female part) of the same or another flower. This is essential for fertilization and reproduction in flowering plants.

2. **Identify the Plants**:
- The plants in question are water hyacinth (Eichhornia crassipes) and water lily (Nymphaea). Both of these plants are aquatic and have unique adaptations for their environment.

3. **Examine Pollination Agents**:
- Pollination can occur through various agents, including:
- Water currents
- Wind
- Insects

4. **Analyze Water Hyacinth**:
- Water hyacinth has bright purple flowers that are attractive to insects. This suggests that pollination in water hyacinth primarily occurs through insect activity.

5. **Analyze Water Lily**:
- Water lilies also have flowers that can be pollinated by insects. Additionally, they may be affected by wind, but the primary pollination agent remains insects.

6. **Consider Water as a Pollination Agent**:
- Although these plants live in water, their flowers typically emerge above the water's surface. This means that water currents are not effective for pollination in these species.

7. **Conclusion**:
- For both water hyacinth and water lily, the primary agents of pollination are insects and, to a lesser extent, wind. Therefore, the correct answer is that pollination takes place by insects and wind.

### Final Answer:
Pollination in water hyacinth and water lily takes place by **insects and wind**.