Final answer:
The stamen of a flower consists of the filament, which supports the anther, the part of the flower that contains the pollen grains vital for plant reproduction.
Step-by-step explanation:
The stamen consists of a long stalk called the filament that supports the anther. The correct answer to the question is d) Anther. The stamen is the male reproductive part of a flower and is responsible for the production of pollen. The anther is held by the filament and contains pollen sacs where pollen grains form, which are crucial for plant reproduction as they contain the male gametes. Pollen grains are typically dispersed by wind or pollinators, eventually reaching the female part of another flower, the pistil, which includes the stigma, style, and ovary.