The following phenomena are the effects of temperature on human activities: (　) ① Houses in tropical desert areas have thick walls and small windows, which can reduce the room temperature.

Human beings living on the earth are interconnected, interdependent, and mutually restricted with their living environment, forming a unified and indivisible whole, among which climate factors affect human life. (1) Houses in tropical desert areas have thick walls and small windows, which can reduce room temperature changes. This is how humans deal with high temperatures, and this is the impact of temperature on human life; (2) The reason why cold drinks are so popular in summer is because When the temperature is high, people use cold drinks to relieve heat. This is the impact of temperature on human life. (3) In the Northeast, when the temperature is low in winter, people like to stay warm on the hot kang. This is the impact of temperature on human life. (4) It has not rained for two months and farmers are unable to sow. This is due to the impact of precipitation.

So choose: B.