Final answer:
Opening car windows provides fresh air and stimulation that can temporarily help in staying awake when drowsy behind the wheel, but it's not a substitute for adequate sleep, which is essential for safe driving. correct option is 4.
Step-by-step explanation:
An effective way to remain awake and alert when feeling drowsy behind the wheel is to open the car windows. This action helps by providing a rush of fresh air, which can invigorate the senses and improve alertness. Additionally, the change in air pressure and the flow of air can create a more stimulating environment that may help to combat sleepiness.
However, it's important to acknowledge that this is only a temporary solution. If you're feeling consistently drowsy while driving, it's crucial to recognize that this could be a sign of sleep deprivation. In such cases, the most effective measures are preventative, such as ensuring adequate sleep, avoiding alcohol and heavy meals before driving, and taking regular breaks during long trips.
If drowsiness persists, it's safest to pull over and take a short nap if possible or switch drivers if you're not alone. Sleep deprivation significantly impairs driving performance, as it affects reaction time, decision making, and ability to concentrate, which are all critical for safe driving.