Traditional dwellings in southern Yunnan

(1) Minnan area is located in the south of China, with more precipitation and relatively large roof slope;

(2) The climate in southern Yunnan is hot and humid, with bamboo architecture as the main climate;

(3) Northeast China is rich in forest resources, mainly dry wooden houses;

(4) Cave dwellings are residential buildings on the Loess Plateau.

Therefore, choose: B.