Why Haiti and Dominican Republic split into 2?

Help I please ASAP

Which theory suggested that the earth was once a signle supercontient that gradually that broke up into the contients that we know today

Me plzzz what is the ratio of water than falls on land as compared to the amount that falls onto the oceans? what role do clouds play in regulating earth’s energy balance? me plzzz

Scientists think that convection currents flow in earth’s a. continents. b. mantle. c. lithosphere. d. inner core.