What may form in a large body of water such as a lake or ocean, is a delta
The answer is b. elastic deformation
In geologically active areas, stress causes rocks to deform or stretch out. But when the stress ends, the faults return back to normal through elastic deformation. They regain their original shape.
The highest African mountain is Kilimanjaro, which has three peaks, named Kibo, Mawenzi and Shira, of which Kibo is the tallest.