Explanation:

- Ovary: This is where fertilization occurs. After pollination, pollen travels down the style to the ovary. Here, it fertilizes the ovules, which can develop into seeds.

Correct Answer: Option 1 - Ovary

- Filament: Part of the male reproductive structure. It supports the anther, which produces pollen. It’s not involved in fertilization directly.

- Style: A tube-like structure that connects the stigma to the ovary. It allows pollen to travel to the ovary but is not where fertilization occurs.

- Stigma: The sticky top part of the pistil. It captures pollen but is not the site of fertilization.