Jack conditions his dog Luna to sit using reward-based training techniques commonly known as positive reinforcement. Instead of employing punishment or forceful methods, Jack focuses on rewarding Luna whenever she exhibits the desired behavior of sitting down. By associating sitting with praise, treats, or other incentives that Luna finds motivating, Jack encourages her to repeat this action more consistently in the future. Over time, Luna learns that sitting leads to positive outcomes and willingly complies with Jack's command without any coercion or fear-based tactics involved in the training process.