I am not sure but I am guessing carbon and nitrogen :)
B is correct, Organisms in the same group have similar characteristics
D. 9PM is what i would think it to be
Flora:Calochortus flexuosus, Calochortus kennedyi, Opuntia echinocarpa.
Fauna:bighorn, coyote, bobcat, mountain lion, and mule deer. Mule deer