3. What is a habit? Describe one healthy habit and
one unhealthy habit.

A habit is a behavior that is repeated so often that it becomes almost automatic. One healthy habit I have is being sure to get lots of sleep on the weekend to make up for lost sleep during the week. One unhealthy habit I have is forgetting to eat vegetables.

Explanation:

a. steroid--> influences moods in the limbic system

b. inhalant--> dissolves fatty tissue in the brain

c. marijuana--> changes how the hippocampus processes sensations