Answer:
Biology is the science that studies life, but what exactly is life? This may sound like a silly question with an obvious response, but it is not always easy to define life. For example, a branch of biology called virology studies viruses, which exhibit some of the characteristics of living entities but lack others.
The crowd with which Ben associates serves as a reference group.
A reference group refers to any group of people which share and influence other people's behaviors, ideas, beliefs, and opinions. Given that Ben spends a lot of time with the 'jocks,' Greg and Larry, he is considered by others a member of their group as he shares the same interests and ideas as them.
The same way you would treat your friends/family, with respect. Always say hi and smile.
