Name an effect of marijuana on driving.

Marijuana has a well-documented impact on driving abilities, primarily through the impairment of coordination. When someone consumes marijuana, the psychoactive component, THC, affects various cognitive and motor functions. This can lead to reduced coordination, which is crucial for activities such as steering a vehicle, controlling speed, and responding to unexpected road conditions.

Impaired coordination can manifest in difficulties with balance and fine motor skills, making it harder for an individual to operate a vehicle safely. Consequently, this can increase the risk of accidents and dangerous driving behavior, as the driver may not react adequately to the demands of the road.

The other options imply effects that are not typically associated with marijuana use while driving. For instance, increased focus, faster reaction times, and improved perception do not accurately reflect the potential impairments caused by marijuana, which typically leads to decreased attention span and slower reflexes. This understanding is crucial for promoting safe driving practices.