This topic studies geological structure and tectonic geomorphology. Geological structures are divided into folds (anticlines and synclines) and faults. The topography of fold formation is generally as follows: (1) anticlines form mountains; Syncline into the valley.
Reversed terrain: the top of anticline is eroded into a valley by tension; Synclinal trough is hard and not easy to be eroded, but becomes a mountain. Faults lift rocks into mountains or highlands (Huashan, Lushan and Taishan).
Rockfall (graben) forms valleys or lowlands (Weihe Plain and Fenhe River Basin). The geological structure in the valley is a graben formed by fault subsidence, and the formation of sediments in the valley reflects flowing water deposition. So this question chooses option C.
Resume, as a special applied style, is an important medium between job hunting and recruitment of mathematics teachers. The following is a sample of my resume