Explain tectonic movement, how it happens, and what it does over time

Tectonic shift is the movement of the plates that make up Earth's crust. ... As Earth's mantle heated and cooled over many millennia, the outer crust broke up and commenced the plate motion that continues today. The huge continent eventually broke apart, creating new and ever-changing land masses and oceans.

the answer is c.) there is a warm front in region a and a stationary front in region b.