What environmental factor can significantly increase the risk of accidents?

Heavy rain or fog significantly increases the risk of accidents due to their adverse effects on driving conditions. These weather phenomena can lead to reduced visibility, making it difficult for drivers to see other vehicles, road signs, and obstacles. Heavy rain can also create slick road surfaces, increasing the likelihood of skidding or hydroplaning, especially if vehicles are unable to maintain proper tire traction. Similarly, fog can obscure drivers’ vision, often leading to slower reaction times in response to unforeseen road hazards. Therefore, these environmental factors necessitate heightened caution and lower speeds to ensure safety on the road. The capacity of drivers to react appropriately diminishes under such conditions, emphasizing the need for awareness and consideration of the environment when driving.