Answer:
Systematic desensitizatiion.
Explanation:
This technique is commonly used to treat fear, anxiety and phobias. The person, as in the exercise, is gradually exposed to an anxiety-producing stimulus (in this case a snake) while being in a relaxed state. Systematic desensitization it's the name of said behavioral technique. It's goal is to reduce the cause of fear or anxiety in an object or thing.
Could be B but I am not 100 percent sure
Answer: Their son chose this group because he shares their interests.
Though the answer isn't too obvious, it makes sense.
Hope this helped :)
The river north of the Colorado river is the Green River
And if u want to look for yourself just look at a map.