Question

coal is composed mainly of
a.oxygen
b.carbon dioxide
c.carbon
d.nitrogen​

Answer 1

Answer:

c) carbon

Explanation:

I hope it may help you

Answer 2

Answer:

Coal is a black or brownish-black sedimentary rock that can be burned for fuel and used to generate electricity. It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning).