Final answer:
Alcohol affects the brain's ability to coordinate vision, balance, speech, and hearing, leading to blurred vision, slurred speech, poor balance, and compromised judgment, which can result in various negative consequences including road accidents.
Step-by-step explanation:
Alcohol consumption can adversely impact hearing, speech, vision, and balance. After consuming four drinks, the effects of alcohol on the brain can lead to hearing disturbances and a loss of coordination, which affects balance. This is due to the alcohol's impact on the cerebellum, which is responsible for coordinating movements. An individual may experience blurred vision as alcohol reduces visual acuity and reaction times, while speech can become slurred and difficult to understand. Additionally, judgment and decision-making capacities are compromised, which can manifest in riskier behaviors such as aggressive conduct or, as noted, contribute significantly to road accidents. Long-term consequences of excessive alcohol consumption might include job loss, family disruptions, memory problems, liver cirrhosis, increased cancer risk, and serious effects on the excretory system, particularly liver and kidney disease.