Embryo sac represents

The correct option is A

megagametophyte

The correct option is A.

Explanation for the correct option.

1. The embryo sac represents a female gametophyte or megagametophyte.
2. The functional megaspore gives rise to the embryo sac.
3. The megasporangium is represented by ovules that develop on megasporophyll.
4. The female gamete is referred to as an egg.

Explanation for the incorrect options:

Option B:

1. Meiosis is the process by which megaspores are produced in megaspore mother cells.
2. Megaspores mature into a female gametophyte capable of producing female gametes or eggs.
3. Megaspores are the larger of the two spores produced by heterosporous plants.

Option C:

1. A female gametophyte produced by megaspores.

Option D:

1. A sporangia-containing sporophyll is a leaf component.
2. Sporophylls are found in both microphylls and megaphylls.
3. Megasporophylls are sporophylls in plants that bear megasporangia.
4. Plants that bear microsporangia are known as microsporophylls.

Final answer: Embryo sac represents megagametophyte.