How do i find the answer for question 3 and 4?

How do scientists think that gravity affected the formation of our solar system?

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

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