What makes a community?

What makes a community? Communities are separated into different parts to build a community. Communities are built by having a group of people who  cares for each other and they are all in the same ideas or they live with each other. Sometimes there will be a apartment that is a community, because when there is a problem or if someone needs help they will help each other or they will try to solve the problem. Communities can be build up by people who are willing to help so that people can live better. There are also people who are in charge of the whole community. And of course there are also the people who lives in the community that make the whole community work. I live in a apartment for my piano classes and sometimes they will have meetings so that everyone can know the latest news and learn about the new established rules.