A change in the core would have the greatest effect on the convection currents in the mantle. Hope this helped!
The answer to this would be A, because they began to spread westward once they decided to head away from the Arctic.
Fossil fuels are nonrenewable
Answer: Gneiss
Explanation: Gneiss is a metamorphic rock formed from shale at very high temperature and pressure condition. They exhibit a preferred alignment or orientation of platy minerals called foliation. They are coarse grained and exhibit gneissose banding. They are formed from highest grade regional metamorphism with temperature between 450 - 600 degree celcius and pressure between 800 - 1000 mega pascal. They generally occur in cores of fold mountain belts where mountain ranges have been eroded.
