Sexual reproduction requires the male gametophyte in plants.

Concept: The above-given statement is true.

1. There are numerous plant phyla that practise sexual reproduction. The two stages of these plants' life cycles are the gametophyte stage and the sporophyte stage.
2. The male gametophyte is crucial for crop output and plant fertility because it synthesises male gametes for two-fold fertilisation.
3. The male gametophyte develops and expands inside an immature anther. The male gametophyte is often alluded to as the pollen grain because pollen grows in a part of the plant's male reproductive system called the microsporangium.
4. Throughout their entire life cycle, angiosperms obey the alternation of generations. The gametophyte, a haploid sporophyte that switches with a diploid sporophyte throughout sexual reproduction in angiosperm blooms, holds the reproductive organs of a plant.

Hence, option A is the correct answer.