Which of the following factors can affect a person's ability to drive safely?

Alcohol consumption significantly impairs a person's ability to drive safely due to its effects on the central nervous system. When an individual consumes alcohol, it can affect judgment, coordination, reaction times, and overall cognitive function. This leads to decreased awareness of surroundings, increased likelihood of taking risks, and diminished ability to make sound decisions while driving. All these impairments can result in a higher probability of accidents, making it crucial to avoid drinking and driving.

While factors like tire pressure, car color, and time of year can influence driving conditions, they do not have the direct, immediate impact on a driver's cognitive and physical abilities that alcohol does. Proper tire pressure is important for vehicle handling and safety, but it does not impair the driver's mental state. The color of a car may affect visibility and perceptions but does not influence driving ability. Seasonal changes can impact road conditions and visibility, yet they do not directly affect a driver's capabilities in the same way that alcohol does.