Answer:
True.
Step-by-step explanation:
The functional skill are important to perform any task or any work. This functional skill also determine the mental status of the individual and thinking skill as well.
Chemicals like alcohol and barbiturates are addicted in nature and can affect the thinking ability of the individual. If the driver drinks alcohol this might affect his ability of driving and lane changing. The excess alcohol completely shuts his thinking ability.
Thus, the answer is true.