Ascomycota, often known as sac fungi, is a phylum of fungi (kingdom Fungi) that is distinguished by the ascus, a sac-like structure that contains four to eight ascospores in the reproductive stage.
No, Agaricus is a basidiomycete.
The genus Agaricus includes both edible and deadly mushrooms.
Agaricus belongs to the basidiomycetes division because its spores grow on projections that emerge from microscopic cells called basidia rather than being enveloped within cells.