A、By Crushing lArgE Amounts oF stonE.
B、By CAusing muD or sAnD to mix with oCEAn wAtEr.
C．By CrEAting lArgE wAvEs on thE surFACE oF thE oCEAn.
D．By grEAtly inCrEAsing thE oCEAn’s DEpth in somE ArEAs.