Final answer:
Driver error is the primary cause of collisions, leading to a significant percentage of fatal auto accidents.
Explanation:
Driver error is the biggest cause of collisions, responsible for approximately 54% of fatal auto accidents according to the American Automobile Association. Factors such as failing eyesight, slower reflexes, and distracted driving contribute to accidents among drivers, while safety features like crumple zones in modern cars aim to reduce injuries during collisions.
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