which one of the following has not been proposed as a mechanism of plate motion
A) slab-pull
B) ridge-push
C) mantle convection
D) crust-core convection
IT'S A SCIENCE QUESTION I ACCIDENTALLY PRESSED HISTORY
A) slab-pull
B) ridge-push
C) mantle convection
D) crust-core convection
IT'S A SCIENCE QUESTION I ACCIDENTALLY PRESSED HISTORY