Describe 2 main functions of the Greek Chorus. help me please for my theatre class lol thanks

One of the primary functions of the chorus is to provide atmosphere and, in some ways, underscore the tragic action.

i would think b and c

option c (nickel) is not found in earth's crust. the earth's crust basically contains eight (8) elements namely: oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium (listed in order of abundance).