Which of the following is a consequence strategy?

The choice of removing privileges after an undesired behavior as a consequence strategy is correct because it directly relates to the concept of applying consequences to modify behavior. In behavior analysis, consequence strategies are interventions that follow a behavior, aimed at influencing future occurrences of that behavior. When privileges are removed after an undesired behavior, it serves as a punishment, which can decrease the likelihood of that behavior happening again in the future. This aligns with the principles of operant conditioning, where behaviors can be modified through reinforcement or punishment.

In contrast, providing a treat after a positive behavior is a reinforcement strategy designed to increase desirable behavior rather than a consequence for an existing behavior. Giving a warning before a problem behavior occurs is a proactive strategy intended to prevent the behavior rather than responding to it after the fact. Lastly, teaching alternative skills before a behavior occurs involves preventive measures and skills training rather than a direct consequence for an undesirable behavior. Thus, removing privileges post-incident accurately embodies the definition of a consequence strategy within behavior management.