Answer:
1. Depressants slow the body's natural way of doing things, and lower your mood, causing you to feel depressed.
2. They are obtained by drug deals, and buying alcohol.
3. The method of usage varies between drug, but most commonly are drank, eaten in pill form, injected into a vein, or inhaled.
4. Reasons for taking these drugs are:
- wanting to get high
- wanting to have a "good time"
- because the user is depressed and wants to make themselves feel better
- boredom or wanting to experience drugs at least once in their life
- peer pressure
Hope this helped you out :)