This is a opinionated prompt. It is about your opinion. Me personally I think it is not the same thing as selfish. But I mean for example say if I wanted a drink and I was determined to get one from the coke machine no matter what. Is that just me being selfish or is that me just really thirsty? Hope I helped.
I would say that a crustacean is both a producer and prey.
Sitting in your assigned seat in school is an example of a social-conventional rule. Social-conventional rules are agreed upon by society and may take the form of a custom. Sitting in your assigned seat at school is considered a social-conventional rule because children are expected to listen to their teachers at school. This is a socially agreed upon rule.