Answer: The diagram of the circuit is missing but I will give you a general answer based on the scope of your question
Answer : Parallel circuit
Step-by-step explanation:
When a light bulb goes off and the other lightbulbs continues to glow, then the circuit connecting the lightbulbs is a Parallel circuit.
Hence the circuit that is built so that one lightbulb can go out and the other three lightbulbs will continue to glow as seen in the question fits the description above.
A parallel circuit allows the continuous flow of current even when some path of the circuit is cut off .