The police car can be seen as a system where different parts work together to perform a specific function. When looking at the options provided:
- The road: While the police car interacts with the road, the road itself is not a part of the police car system. The road is an external element that the police car operates on.
- The tires: The tires are a crucial part of the police car system. They are essential for the car's movement, traction, and overall performance.
- The weather: The weather is an external factor that can impact the performance of the police car but is not a direct part of the police car system.
- Other cars: Other cars on the road are external entities that the police car may interact with but are not components of the police car system.
Therefore, of the options provided, the tires are a part of the police car system. They are directly involved in the functioning of the car and are essential for its operation.
