The part of a flower that makes eggs and grows into seeds is the ovary.

Here's why:

* Ovary: The ovary is the swollen base of the pistil, the female reproductive part of the flower. It contains one or more ovules, which are essentially the eggs of the plant.

* Fertilization: When pollen from the male part of the flower (the stamen) reaches the ovule, fertilization occurs. This process combines the male and female genetic material.

* Seed Development: After fertilization, the ovule develops into a seed, which contains the embryo of the new plant and a food source for its initial growth.

* Fruit Development: The ovary itself often swells and matures into a fruit, which is the protective structure that encloses the seeds.

So, the ovary is the key player in the flower's reproductive process, ultimately leading to the creation of seeds that can grow into new plants.