Final answer:
Option C). Temporary Anchorage Devices (TADS) have the greatest effect on intrusion, which is the downward movement of teeth into the jawbone.
Step-by-step explanation:
The correct answer is C. Intrusion.
Orthodontic devices known as Temporary Anchorage Devices (TADS) are used to give extra anchorage to enable specific tooth movements. They can be used to regulate and focus the forces exerted on the teeth, causing the teeth to move in predetermined ways.
When it comes to intrusion—the lower, inferior movement of teeth into the jawbone—TADS have the biggest impact. Orthodontists can apply vertical forces to teeth that are crowded without harming neighboring teeth or supporting structures by employing TADS.