The correct option is
B Bear spores which help in reproduction
The gills of mushroom produce spores which help in the process of reproduction. The gills of mushroom hang vertically below its cap and allow the spores to fall in the downward direction into the air. These spores are further carried out by natural pollinators such as wind, insects and animals for the process of reproduction.
So, the correct answer is 'bear spores which help in reproduction'.