What is the name of the phenomenon of wearing down of relief variations of the surface of the Earth through erosion?AGerminationBSolidificationCEruptionsDGradationAnswer: D. Gradation Read Explanation: The phenomenon of wearing down of relief variations of the Earth's surface through erosion is known as gradation Gradation:This term refers to the overall process of leveling the Earth's surface through the combined actions of erosion and deposition. Read more in App