When plate tectonics cause cracks to form, scientists expect entire continents to fall into the earth volcanoes can occur a large rift usually remains and is never filled in most likely the country of mexico will separate from the continental united states

I think it's the 2nd one,  Volcanoes can occur.

The answer is B.

During plate tectonics, cracks may occur in the earth crust that causes magma to rise up from the mantle. The cracks may also cause cracks to form on the crust that makes outlet channels for the magma in magma chambers. These result in volcanic eruptions on the surface of the earth that form volcanic features such as mountains.

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.