小王在公园玩时看到一群外国游客，他很好奇，就远远地跟着想看他们都干些什么。（ ）
The Greens ________live in the south of Asia . They don't want to move to the north because they ________ the cold weather.
①.自然因素 ②.社会因素 ③.家庭和学校因素 ④.个人因素
