Answer: D. The ovary contains the ovules which become seeds once fertilized.
Explanation: The ovary is located at the base of the pistil, which is the female reproductive part of the flower.
During the process of pollination, pollen grains from the male reproductive organs of a flower (such as the anther) are transferred to the stigma, which is located at the top of the pistil. From the stigma, the pollen grains travel down a tube called the style and reach the ovary.
Once the pollen grains reach the ovary, they fertilize the ovules, which are located inside the ovary. Fertilization occurs when a pollen grain fuses with an ovule, resulting in the formation of a seed.