The male gametophytes of flowering plants are also referred to as the male gametophytes of flowering plants are also referred to as pollen grains megaspores endosperm embryo sacs male sporophytes

Pollen Grains is also known as male gametophytes of a flowering plant. They represent the male portion in the reproductive process. Pollen grains are tiny bodies which get transported through wind, insect or other natural agents, joins with the female parts of the flower through the process of fertilisation, resulting in the formation of seeds.

Your answer is a because that is true

25 ) where the jellyfish were counted at