nectar and pollen
Nectar is a sweet substance, produced by some plants to attract pollinators such as bees, butterflies and hummingbirds. Bees collect nectar and make it into honey. While collecting the nectar, pollinators accidentally transfer pollen from male flowers to female flowers.
Pollen is a fine powder of microscopic particles from the male flower that can fertilize the female flower to produce seed. Pollen is produced by anthers, the male reproductive organs found in most flowering plants.