The right answer is "cross" or "cross pollination" or "cross-pollination"

It is known as pollination (sometimes as cross-pollination).

The purpose of cross-pollination and self-pollination are to perform reproduction so off spring can be produced.

In cross pollination there is wastage of pollen grains , but in self pollination there is no wastage of pollen grains.

The process of pollination from same flower is called self-pollination.

the process of pollination from another flower of same breed is called cross-pollination.