As energy flows through an ecosystem, energy as it moves to the next trophic level A. decreases by 10%
B. increases by 90%
C. decreases by 90%
D. increases by 10%

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.

nucleus

would be most reasonable answer tbh