Why the other bulb remains lighted when you unscrewed one of them in a parallel circuit?

Why the other bulb remains lighted when you unscrewed one of them in a parallel circuit?
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In a parallel circuit, in this case the electrons still have a complete circuit. For example, if it is a DC circuit, the electrons can still go from the negative terminal of a battery, pass through the bulb thatis not unscrewed, and continue to the positive terminal in the battery.
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