The umbrella-like structure in a mushroom is called the
fruiting body. The fruiting body or the pileus is the cap of the mushroom that
produces spore in order to reproduce. They vary in different sizes and are
classified according to their structures.
I think it is A or C
Thanks
AMINO ACIDS, because it is the monomer of Protein..
External stimulus
The stimulus to which the organism is adapting to is outside of the organism's body.