Final answer:
Oil and gasoline leaks on the road reduce control of cars in light rain. Heavy rain exacerbates slippery conditions and further reduces control.
Step-by-step explanation:
When oil and gasoline leak onto the road surface and a light rain falls, it reduces the control of the car. The water mixes with the oil and creates a layer of lubrication, making the road surface more slippery. This reduces the friction between the car's tires and the road, making it more difficult for the tires to grip the road and decreasing control.
In the case of a heavy rain, it exacerbates the slippery conditions caused by the oil and gasoline. The water further dilutes the lubricating effect of the oil and reduces traction even more, leading to reduced control of the car.