A) Series circuits:
1. In a series circuit, electricity has only one path to flow through.
2. All the electrical components are connected in this path.
3. If any one of them is removed or is not functioning properly, the circuit will be incomplete.
B) Parallel circuits:
1. A parallel circuit has more than one path for the flow of electricity.
2. Each bulb in the circuit is connected in a separate path through which electricity can flow.