Final answer:
The behavioral tactic of denying the lunch break to workers who complete fewer than 20 toys during the morning hours is an example of negative punishment.
Step-by-step explanation:
This behavioral tactic is an example of negative punishment in operant conditioning. In negative punishment, a pleasant stimulus is removed to decrease a behavior. In this case, the workers are denied a lunch break if they complete fewer than 20 toys during the morning hours. By taking away the lunch break, the bosses aim to decrease the behavior of laziness. This tactic is meant to motivate the workers to be more productive.