Answer:
C. lateral continuity
Step-by-step explanation:
The question above is related to the "Principles of Geology." These principles are very important not only in determining the age of rocks but in knowing how they came about and existed through time.
The "Law of Lateral Continuity" states that rock layers will just be the same even if they're divided due to an event. This means that the rock layers are continuous in a lateral manner. So, the rock layers on the left side of the valley will just be the same with the rock layers on the right side even after a river erodes the valley.