Final answer:
Psychedelics cause an alteration of the perception of reality, leading to hallucinations and a skewed perception of time.
Step-by-step explanation:
The psychedelics, as a class of drugs, cause an alteration of the perception of reality (option d). Psychedelics, also known as hallucinogens, produce profound alterations in sensory and perceptual experiences, leading to hallucinations and a skewed perception of time.
For example, drugs like LSD and mescaline are serotonin agonists, which affect the neurotransmitter systems in the brain and result in hallucinatory experiences. These drugs can induce vivid visuals and altered states of consciousness, causing a distortion of reality.
It's important to note that the effects of psychedelics can vary among individuals, and their use may have significant negative side effects. Misuse of these drugs can lead to addiction and other negative consequences.