Look at the picture to complete the problem 10, 1 1. 10. It can be seen from the change of wall thickness in traditional houses in European countries that the climate here is from west to east () 1 1.

Because the eastern part of Europe extends to the interior of Eurasia, the climate in the eastern part has obvious continental characteristics, mainly in the annual and daily changes of temperature. Compared with other regions in the same latitude in the world, the temperature is obviously lower in winter and higher in summer, which leads to the wall thickness of European countries gradually increasing from coastal to inland.

So choose: C.