Which of the following structures is associated with the male reproductive part of a plant?

The stamen is indeed the male reproductive structure of a plant. It is comprised of two main parts: the anther and the filament. The anther produces pollen, which contains the male gametes (sperm cells) necessary for fertilization. The filament supports the anther, holding it up to facilitate the transfer of pollen either by wind, insects, or other means to the female reproductive structures.

In comparison, the pistil is associated with the female reproductive part of a flower, containing the ovary, style, and stigma. Petals are primarily involved in attracting pollinators due to their color and fragrance. Sepals, also protective structures, serve to enclose and protect the flower bud before it opens. Each of these parts plays distinct roles in the reproduction and life cycle of flowering plants, but only the stamen is directly involved in the production of male gametes.