Which of the following is a common cause of boating accidents?

Excessive speed is a common cause of boating accidents because it significantly reduces a captain's ability to respond to sudden obstacles, changes in the environment, or the behavior of other vessels. When a vessel is moving too fast, the driver has limited time to react to hazards, which increases the likelihood of collisions or capsizing. Speed also impacts the stability of the boat, making it harder to control, especially in adverse weather conditions or rough waters. Safe boating practices emphasize maintaining a speed that allows for full control and the capacity to navigate safely in varying conditions.

While factors like too many passengers, low fuel levels, and improper storage of gear can contribute to accidents, excessive speed directly affects the control and navigation of the vessel, which is why it is often highlighted as a primary cause in safety courses and boating regulations.