Dema has just taken a psychoactive drug. we can expect dema's behavior to change because these drugs interfere with in the brain and body.

We expect Dema's behavior to change because the psychoactive drug she took will interfere with the neurotransmitters in her brain and body. As a result, her behavior will be influenced by the changes the psychoactive drug had on her neurotransmitters. For example, this may cause Dema to have a faster or slower reaction than she would have had without the drug.

Prevention of second hand smoke

Awould be the answer