Which of the following can be used to increase a behavior?

The correct answer encompasses all the choices, highlighting that various reinforcement strategies can effectively increase a behavior. Intermittent reinforcement involves providing reinforcements unpredictably, which can enhance the strength and persistence of a behavior over time as people learn to expect rewards at uncertain intervals. Negative reinforcement focuses on the removal of an aversive stimulus to strengthen a behavior. For example, a student might study harder to avoid the anxiety of failing an exam. Positive reinforcement, on the other hand, involves providing a desirable outcome after a behavior occurs, such as giving praise or rewards for successfully completing a task. All these methods contribute to the likelihood of a behavior being repeated, demonstrating that different forms of reinforcement can be effective in different contexts. Thus, each choice is valid and contributes to the overarching principle of reinforcing behaviors.