Have you ever heard of a place called a Common-Interest Development, or CID for short? It's like a special kind of neighborhood where a group of people share things together. Kind of like how we all share toys at school, but for grown-ups living in a special community.
In a common-interest development, everyone agrees to follow the same rules and help take care of the community together. This means that there are special people called HOA (homeowner association) that help make decisions for the community, like what color to paint the houses or what kind of flowers to plant.
Also, people who live in a common-interest development share things like swimming pools, playgrounds, and even roads! This means that everyone who lives there will help pay for these things together to make sure they are maintained and everyone can use them.
It's kind of like living with a big family, where everyone pitches in and works together to keep things nice and happy.