I am so confused the only ones im really confused on is a and b so it's ok if you do those and answer the question anyways 20 points. Question: which 2 species are most? Why?

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.