When using the scientific method which step comes last

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

Which description best characterizes the motion of particles in a solid?

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.