Final answer:
Lavender oil is an essential oil used for its sedating qualities that naturally calms the brain, reduces anxiety, and induces sleepiness, similar to tranquilizer effects.
Step-by-step explanation:
An essential oil known for its sedating qualities is lavender oil. Essential oils like lavender are considered for their ability to act as a natural depressant type of psychoactive substance.
They calm the brain, help reduce anxious feelings, and can induce sleepiness without the need for pharmaceutical tranquilizers such as diazepam or chlordiazepoxide. Instead, they offer a more gentle, natural method to achieve relaxation and ease tension.