Explanation:

- Stigma: The stigma is the topmost part of a flower's pistil. It's where pollen germinates. It's part of the female reproductive structure.

- Stamen: The stamen is the male reproductive part of a flower. It consists of an anther and a filament. The anther produces pollen.

- Style: The style is a part of the pistil between the stigma and the ovary. It aids in pollen movement. It's a female part of the flower.

- Pistil: The pistil is the female reproductive part. It includes the stigma, style, and ovary.