Metal sulfides, evaporites and manganese nodules have some commonalities. They are generally found in regions of high evaporation lying above the continental shelf ( Extended boundaries of continent covered under shallow waters). These all precipitate from water that is over saturated with minerals. Generally found in deep ocean sites.
option that does not fit the pattern is c. calcareous ooze
The PE for this question will be 588,000 because we take the mass (2,000 kg), multiply it by 9.8 which is Gravitational Acceleration and then multiply that by the height (30 meters)