Which of the following is an example of negative reinforcement?
(a)marty knocks over his mother's prize fern so she gives him a time out.
(b)peter comes in late from his lunch and is fired from his job.
(c)tara takes an aspirin, and her headache begins to go away.
(d)gwen mows the lawn and her dad takes her out for ice cream.

(B) Peter comes in late from his lunch and is fired from his job.

Explanation:

Negative reinforcement is a process that is used to make aware and teach specific behavioral characteristics. The use of the negative reinforcement is done to remove the uncomfortable and unpleasant response in behavior.

Among the options given B is the correct option. As Peter behavior of negligence and being late can offend the higher authority and the behavior can be considered as unacceptable. Thus, it is indicating the negative reinforcement.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.