Which of the following conduct the most pollination for angiosperms?

squirrels

butterflies

birds

bees

Bees are the most responsible organsism for pollination in angiosperms. They take nectar from the flowers of angiosperms, and bees take the pollen. When bee visits other plan, they may leave the pollen there and cause pollination. This is a mutual relationship.

In this item, we are given with four insects and animals: (1) squirrels, (2) butterflies, (3) birds, and (4) bees. we are to determine which among them conduct the most pollination for angiosperms. The answer to this item is bees. That is the fourth among the choices.