**Core Concept**
The question is testing the understanding of child management techniques in pediatric dentistry, specifically the use of demonstration as a behavior modification strategy. This concept is rooted in the principles of operant conditioning, where the dentist aims to reinforce desired behavior in the uncooperative child.

**Why the Correct Answer is Right**
Demonstrating procedures on another cooperative child is an example of modeling behavior, a key component of operant conditioning. By observing the calm and cooperative behavior of the model child, the uncooperative child is more likely to adopt similar behavior. This technique is often used in pediatric dentistry to reduce anxiety and increase cooperation in young patients. The dentist's goal is to create a positive association between the dental procedures and the child's behavior, thereby increasing the likelihood of successful treatment.

**Why Each Wrong Option is Incorrect**
**Option A:** is incorrect because it does not accurately describe the technique of demonstrating procedures on another child.
**Option B:** is incorrect because it is a different child management technique, such as distraction, that may be used in certain situations.
**Option C:** is incorrect because it is a type of reinforcement, such as praise or rewards, that is used to motivate behavior, rather than a demonstration technique.

**Clinical Pearl / High-Yield Fact**
A memorable way to remember this technique is to use the acronym "MODEL," which stands for "Motivating Others by Demonstrating Excellent Leadership." This can help pediatric dentists recall the importance of modeling behavior in managing uncooperative children.

**Correct Answer: D. Demonstration.