What is the active impairing ingredient found in Cannabis?

The active impairing ingredient found in cannabis is THC, or tetrahydrocannabinol. THC is the primary psychoactive compound that interacts with the endocannabinoid system in the human body, particularly by binding to the CB1 receptors in the brain. This interaction is responsible for the characteristic "high" associated with cannabis use, as it influences various mental and physical functions including memory, coordination, and time perception.

While CBD (cannabidiol) is another prominent cannabinoid found in cannabis, it is non-psychoactive and does not produce the impairing effects that THC does. CBC (cannabichromene) and CBCV (cannabichromevarin) are also cannabinoids present in cannabis but do not have the same psychoactive effects and are less studied in terms of their impairing potential. THC's specific action on the brain is what qualifies it as the main ingredient responsible for the impairment noted in cannabis use, making it the correct answer in this context.