During plant reproduction, pollen grains need to move from the anther of one flower to the stigma of another flower. This is called pollination. Insects can pollinate flowers, and so can the wind. Insect-pollinated flowers are different in structure from wind-pollinated flowers. This table describes some differences:
We depend upon pollination by insects (including the honey bee) for many of our crops. Without them the security of our food would be threatened.