What factor does NOT contribute to a person's tolerance of alcohol?

The type of vehicle driven does not contribute to a person's tolerance of alcohol because tolerance is primarily influenced by physiological and behavioral factors. Tolerance refers to the body's adaptation to the effects of alcohol over time, which means that individuals may require larger quantities of alcohol to achieve the same effects as they did when they first started drinking.

Genetic factors affect how alcohol is metabolized in the body, impacting how quickly or effectively an individual can process alcohol. Body weight plays a crucial role since a person's weight can influence blood alcohol concentration; generally, a larger body mass can dilute alcohol, affecting its effects. Frequency of consumption also has a significant impact, as regular drinkers may develop a higher tolerance due to repeated exposure.

Thus, the type of vehicle one drives is unrelated to physiological factors influencing alcohol tolerance and does not have any bearing on how an individual reacts to alcohol consumption.