Look at the picture and complete questions 12-13. 12. Regarding the formation of the Himalayas, the correct explanation is ( ) 13. In the picture, there are four places A, B, C and D.

After long-term research, geologists proposed the theory of plate tectonics. The theory of plate tectonics holds that the interiors of plates (A, B, and D) are relatively stable, and (C) the areas at the junction of plates, some are stretched and stretched, some are collided and compressed, and the crust is relatively active, prone to volcanoes and earthquakes. ． Therefore, the relative position of the ocean and land is constantly changing.

So choose: C.