Read the distribution diagram of four geographical areas in China and complete the following questions. (1) The name of the terrain area where A is located is _ _ _ _ _, and the traditional houses her

Read the distribution diagram of four geographical areas in China and complete the following questions. (1) The name of the terrain area where A is located is _ _ _ _ _, and the traditional houses here are _ _ (1)A is located in Inner Mongolia Plateau, where traditional houses are mainly Mongolian yurts. In the picture, the topographic area where B is located is called Loess Plateau, and the local traditional residential buildings built with local materials are caves. The traditional houses in C are mainly bamboo buildings, which reflects the humid climate in this area.

(2) The junction of Heihe River and Tengchong is an important population dividing line in China, with dense population in the east and sparse population in the west;

(3) D in the figure represents the Qinghai-Tibet region among the four geographical regions in China. The agricultural type in this area is mainly valley agriculture, and the planting distribution area is narrow, and the representative crop is highland barley.

So the answer is:

(1) Inner Mongolia Plateau; Mongolian yurts; Loess Plateau; Cave dwelling; Damp heat;

(2)③;

(3) Qinghai-Tibet; Valley agriculture; naked barley