阅读下列短文，根据短文内容填空。在未给提示词的空白处仅填写 1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

Rules help us live together in a community. At my local park, there is a sign that reads, “Keep off the grass.” Because our community has a need for a nice green space 【小题1】 (relax), we are expected to keep our park clean and in good condition for everyone’s enjoyment. If one person breaks the rules, more people 【小题2】 (follow) him and do what they want. In a community, rules are in place to protect everyone. What we do and 【小题3】 we act affect everyone, not just ourselves. We need rules in order to live 【小题4】 (safe).