Hydroplaning can produce one of the _______ deadly skids.

Hydroplaning occurs when there is a loss of traction between the tires of a vehicle and the road surface due to a layer of water, which can result in a vehicle sliding uncontrollably. In the context of driving, particularly under adverse weather conditions, hydroplaning can lead to various types of skids.

The correct answer is four, as there are four primary types of skids related to hydroplaning: oversteering, understeering, front-wheel skids, and rear-wheel skids. Each type has distinct characteristics and handles differently based on the vehicle's dynamics and the driver's control. Understanding these types is crucial for drivers to effectively respond to hydroplaning situations and improve overall road safety. This kind of knowledge is integral to the training that peace officers receive in understanding vehicle dynamics and safety on the roads, especially as they may have to deal with the aftermath of such incidents.