Final answer:
The flower part that encloses something with endosperm is the ovary (c). Additionally, pollen grains develop in the anther, part of the stamen.
Step-by-step explanation:
The flower part that will eventually enclose something with endosperm is the ovary. This corresponds to option c) Ovary for the student's question. The ovary is a part of the flower's female reproductive organ, known as the pistil or gynoecium, and it contains ovules, which after fertilization, develop into seeds within which the endosperm serves as a food source for the developing embryo. The ovary is the 'female' part of the flower and contains the ovules, which will develop into seeds. The ovary also contains the endosperm, which provides nutrition for the developing embryo.
Once fertilization occurs, the ovary will develop into a fruit, enclosing the seeds and protecting them. On the related note for the reference question, pollen grains develop in the anther, which is a part of the stamen - the male reproductive structure of a flower. Therefore, the direct answer to the reference question would be option a) the anther. The anther is responsible for the production of pollen, and upon reaching maturity, it releases pollen to be transferred to the stigma, typically by wind or pollinators.