Apart from insect pollination, some other plants, especially grasses, adopt wind pollination in which they depend on wind to carry their pollen from the anther to the stigma.

Also, I was expecting that you were going to mention the phenomenon of double fertilization in a flowering plant, the germination of the pollen, how the tube reaches the ovule, and the fusion of the diploid nucleus in the ovule with one of the sperm cells in the pollen. WOuld be lovely if you can explain that part.