Pollination by ____ is called ornithophily?

Pollination by ____  is called ornithophily?

Options:

1) Insects

2) Air

3) People

4) Birds

Answer:

4) Birds

Other Details:

• Bird pollination is considered as a costly strategy for plants and it evolves only where there are particular benefits for the plant
• Ecosystems that lack insect pollinators, those in dry regions or isolated islands favour the evolution of ornithophily in plants