Social adaptation refers to changes in the psychology and behavior of individuals in order to achieve a harmonious relationship with the social environment. It is a continuous and changing interaction process between individuals and various social and environmental factors. According to the above definition, Which of the following are social adaptations:. ['After half a year in Hainan, Xiao Wu has fully adapted to the local humid climate.', 'Less than three months abroad, Xiao Huang has basically mastered the local language and is able to hear and read.', 'When introverted Xiao Zhao enters the sales post, he has more opportunities to deal with people and his character becomes lively.', 'Xiao Zhou was not used to living, studying, and even language after entering college, and often called to talk to his family.']