The discovery of a fault line along the ocean floor
UHhHh, B? That should be correct... but uhh, I’m an idiot.
Wen the plates bump into each other, ac earthquake occurs
C. it cannot be used again!
Answer:
For the countour part: Map c, contour is 50m (the lines increases/decreases with 50 meters each step). Map b, need to see the whole map to decide.