Pollnation by birds is

Options

A. Malacophily
B. Ornithophily
C. Chiropterophily
D. Myrmecophily.

Answer

**Step-by-Step Solution:**

1. **Definition of Pollination**: Pollination is the process by which pollen grains are transferred from the male part of a flower (the anther) to the female part (the stigma).

2. **Role of Birds in Pollination**: Certain birds, such as hummingbirds, play a significant role in pollination. They are attracted to flowers for their nectar and, while feeding, they inadvertently pick up pollen on their bodies.

3. **Mechanism of Pollination by Birds**: When these birds move from one flower to another, they transfer the pollen they collected from the first flower to the stigma of the second flower, facilitating fertilization.

4. **Importance of Bird Pollination**: Bird pollination is crucial for the reproduction of many flowering plants. It helps in genetic diversity and the production of fruits and seeds.

5. **Examples of Bird-Pollinated Plants**: Some examples of plants that rely on bird pollination include certain species of orchids, hibiscus, and various types of flowering shrubs.