Question

which of the following is considered a positive reinforcement?
parents take away an individual’s phone because they are mean to their siblings
parents take away an individual’s car because they broke the curfew
earning an allowance for doing household chores

Explanation:

Positive reinforcement involves adding a desirable stimulus to increase a behavior. The first two options are punishments (removing a stimulus to decrease a behavior). Earning an allowance (a desirable thing) for doing chores increases the likelihood of doing chores, so it's positive reinforcement.

Answer:

earning an allowance for doing household chores