Which of the following is an example of positive reinforcement?

Positive reinforcement is a concept in behavioral psychology that involves the introduction of a stimulus after a desired behavior is exhibited, increasing the likelihood that the behavior will occur again in the future. In this case, receiving food is an example of positive reinforcement because it adds a rewarding stimulus that encourages the behavior that preceded it. For instance, if a child completes their homework and is then given a cookie, the cookie serves as a positive reinforcement, making it more likely that the child will complete their homework in the future.

The other options do not fit the definition of positive reinforcement. Not having to wash dishes might be perceived as a negative consequence avoided rather than a reinforcement of a behavior. Getting punished reflects a form of negative reinforcement or punishment aimed at decreasing a behavior. Ignoring bad behavior does not provide any stimulus, positive or negative, which also does not contribute to reinforcing or shaping behavior in any way. Therefore, receiving food is the only choice that clearly demonstrates positive reinforcement by promoting the recurrence of a desired behavior.