Answer:
One suitable input device for this system could be a light sensor. The reason for this choice is that the light sensor can measure the ambient light levels and provide input to the system to determine when the street lights should be turned on or off. This allows the system to respond dynamically to changes in the light levels and ensure that the street lights are turned on at the appropriate times.
A light sensor, it will detect the light, if there is not enough, the streetlights will have to be turned on.
Step-by-step explanation:
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