Many appliances in your home and school use electrical energy. Which of these appliances is intended to convert electrical energy into sound energy? printer

refrigerator

electric heater

music amplifier

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