This calculation shows that burning grams of methane (takes in/gives off) energy

A__ is two or more substances that are together in the same place but are not chemically combined

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

Ineed ! i have no clue how to do this problem.