What is the type of circuit where bulbs are next to each other?

The type of circuit where bulbs are next to each other is called a series circuit. In a series circuit, the current flows through each component in a single path, making it so that if one bulb goes out, the entire circuit will be broken and all bulbs will turn off. This is in contrast to a parallel circuit, where each component has its own separate path for the current to flow, allowing the other bulbs to stay lit even if one goes out.