In which Earth layer are most convection currents that cause seafloor spreading thought to be located? A) crust

B) asthenosphere

C) outer core

D) inner core

The continental divide a divides the united states into east and west b. divides the united states into north and south c. divides the flow of river systems in the united states into east and west d. is a series of rivers and mountains that separates canada from the united states select the best answer from the choices provided.

Were the first to arrive in nowth america. asian french

Witch of the following volcano hazards is made up of rocky particles about the size of a grain of sand