well basically it goes like this
i hopes this helps! even i found it confusing!
a flower produce pollen sacs which has pollen grains in it
A flower produce pollen sacs which has pollen grains in it
because
no, the stamen
The anther produces pollen grains which would be transferred to other plant's stigma which will receive the pollen grains when an insect fly pass it then the pollen grains will be stuck on its wings.
Pollen
pollen grains are little grains in side a flower
pollen grains are produced in pollen sac of anthers which are present on the male gamets of flower
Yes because the pollen then will later produce more and provide which is considered reproduction in term.
the anther contains the pollen
A flower's sperm is contained within the pollen grains. These pollen grains are produced in the male reproductive organs of the flower, called the stamens. When the pollen grains are transferred to the female reproductive organs of another flower, they can fertilize the ovules and lead to seed development.
The anther (the male gametes) contains the pollen grains.