Which of the following is NOT a key factor contributing to drowning?

Strong swimming lessons are not a key factor contributing to drowning; rather, they are an essential preventive measure against it. Effective swimming lessons enable individuals to develop the skills and confidence needed to navigate water safely. By improving swimming ability, these lessons can significantly reduce the risk of drowning, especially for children and inexperienced swimmers.

In contrast, factors such as lack of supervision can lead to dangerous situations where individuals, particularly young children, are left unattended near water. Alcohol consumption impairs judgment and coordination, increasing the likelihood of drowning incidents. A poor swimming ability can also place individuals at a higher risk, as they may struggle to save themselves in emergency situations.

Thus, strong swimming lessons stand out as a beneficial factor that enhances safety and minimizes the chances of drowning, making it the correct choice in this context.