In which type of circuit is there only one path for the current to flow?

In a series circuit, there is indeed only one path for the electric current to flow. This means that all components in the circuit are connected end-to-end, creating a single loop. Because there is only one path, the same current flows through all components in the circuit. If any part of the circuit were to break or be disconnected, the entire circuit would stop working, exemplifying how the flow of current is dependent on that single path.

In contrast, a parallel circuit allows for multiple paths for the current to travel through, leading to independent operation of components. A complex circuit generally refers to a circuit that is made up of multiple interconnected components but does not specifically denote the number of paths for current flow. A closed circuit, while essential for current flow, can exist in both series and parallel configurations and simply implies that the circuit is complete, allowing current to flow. Thus, the defining characteristic of a series circuit is its single pathway for current, distinguishing it from the other types mentioned.