Answer:
Pollination can be described as a method by which pollen from the pale part of a flower travels to the female part of the same or another flower. This process causes fertilization.
When pollen from the same plant fertilize the egg present in the female part of the same plant, then is is termed as self pollination.
When pollen transfers from one plant to the female part of another plant, then it is termed as cross pollination.
Two ways for cross pollination are:
1. By wind
As pollen are thin and very light, they can be transferred by wind to other plants.
2. By insects
The pollen can get stick to the insects and transfer them from one plant to another.