On fertilization, the ovary gets converted into seed and ovule gets converted into fruit.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Terms:**
- First, we need to clarify what an ovary and an ovule are. The ovary is the part of the flower that contains the ovules, which are the structures that develop into seeds after fertilization.

2. **Fertilization Process:**
- During fertilization, pollen grains (which contain male gametes) reach the ovule (female gamete) within the ovary. When fertilization occurs, the ovule is fertilized by the male gamete.

...