This is an example of negative reinforcement.
Her mother scolded her every time Jane bit her nails - so Jane learned that every time she bites her nails, she is going to be scolded sternly by her mother. In order to avoid that, she stopped biting her nails, and thus the reinforcement was successful.
Answer:
If anyone is looking down a upon a person or persons.
Explanation:
It would be if everyone or a particular group of people looked down upon life.