ou give your 4-year-old a sticker every time she remembers to brush her teeth. (She enjoys getting stickers.) This is an example of

Positive reinforcement

Explanation:

Positive reinforcement means giving something rewarding to an individual to when they perform a specific action so that they associate the action with the reward. This leads to them performing the action more often.

Other examples include rewarding your pet with treats for doing a trick, or raising employees wages if they hit a performance target

the answer is definitely a