Distribution area of traditional houses in the world

(1) As can be seen from the picture, ① it is an igloo in the Arctic, ② it is a bunker in West Asia, ③ it is a cave in the Loess Plateau, ④ it is an elevated house in Southeast Asia;

(2) The igloo in the Arctic reflects its perennial cold climate. West Asia mainly belongs to tropical desert climate, which is hot and dry all year round. In order to reduce heat transfer and sandstorm invasion, local people build more bunker houses with thick walls and small windows.

(3) The residential building ④ is an elevated building, with people living upstairs and livestock raised downstairs, which reflects the local hot and humid climate. People live upstairs in ventilation to avoid humidity;

(4) Dwellings ③ are caves, which are traditional dwellings built by local people to adapt to the characteristics of Leng Xia fever in winter, and distributed in the Loess Plateau;

(5) The residents are mainly yellow, and the residents are mainly white;

(6) The relationship between traditional houses and the environment of a region is generally close, but with the development of science and technology and the increasing frequency of cultural exchanges, the relationship between modern houses and the local natural environment is gradually weakening.

So the answer is: (1) igloo; Bunker house; Cave dwelling; Elevated house; (2) It is very cold all the year round; Thick; Downward; Heat; (3) damp heat; Ventilation to avoid humidity; (4) Leng Xia fever in winter; (5) residents of ③; White; (6) close; Weaken.