How can you tell that a chemical habge has occurred. plz

Subduction zones occur on earth where dense oceanic crust dives under more buoyant continental crust. these boundaries are characterized by a deep ocean trench next to a high continental mountain range, large numbers of earthquakes and volcanoes. all of this is further evidence for the a) big bang theory b) origin of the species eliminate c theory of plate tectonics d theory of natural selection 4 sedimentary rocks found high in the himalayen mountain

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

Which statement best describes the flow of energy in this scenario