Need answer asap

what type of energy results from the burning of wood or gasoline?

chemical energy is observed when wood or gas is burned

potential energy is observed when wood or gas is burned

mechanical energy is observed when wood or gas is burned

elastic potential energy is observed when wood or gas is burned

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.