Final answer:
The Intelligent Auto Headlight system in cars uses sensors to automatically turn the headlights on and off based on the surrounding conditions.
Step-by-step explanation:
The Intelligent Auto Headlight system in cars uses sensors to automatically turn the headlights on and off based on the surrounding conditions. It typically works using a combination of ambient light sensors and vehicle speed sensors. When the ambient light level drops below a certain threshold or when the car is traveling at a certain speed, the system automatically turns on the headlights to ensure visibility.