参考答案：C

解析：[听力原文]Culture can be defined as behavior that is learned and transmitted to members of a group. A child learns a particular behavior through observation as well as through positive and negative feedback from his/her family and peers. A minor point to remember is that this feedback can be overt or covert. Much covert feedback involves nonverbal cues that an outsider to that culture would not understand.

[分析]： 主旨题。 题干要求找出本段讨论的主要内容。原文第一句阐明Culture can be defined as behavior that is learned and transmitted to members of a group即文化可以定义为被群体成员学习并传播的行为，接着以儿童学习某种行为的方式来具体说明第一句的观点。由此可见，选项C“行为作为文化构建”的内容与原文相符，因此该项是正确答案。[解题关键] 一般段落首句是中心句，点明全段的主要内容，因此注意听中心句的主干部分的内容，可迅速判断本段的主旨大意。