Accidental death is the fifth leading cause of death in the united states, and fatalities related to motor vehicle traffic are the number cause of accidental death.

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Explanation:

According to my research on studies conducted in 2018 within the United States of America, I can say that based on the information provided within the question the number one cause of accidental deaths in the United States are motor vehicle traffic.  The Second leading cause of death is said to be poisoning which includes drug overdoses.

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