Final answer:
The anther dehisces to release pollen grains, which are crucial for the reproduction of flowering plants through the pollination process.
Step-by-step explanation:
The anther, which is a sac-like structure at the tip of a stamen, dehisces (splits open) to release pollen grains. This process is essential for the reproductive cycle of flowering plants, as it allows pollen, containing the male gametophytes, to be transported to the stigma of a flower. Here, pollen grains can complete their development, germinate, and form a pollen tube that enables the sperm to travel and fertilize an egg within the ovule, leading to the formation of seeds.