What is the name for the process of recycling materials that make up the earths crust and mantle

What reaction is taking place? 02 + c3h8 = h20 + co2

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

Light waves travel than sound waves.