Final Answer:
In order to adjust the threshold of a door, shims or screws can be used, allowing for precise modifications to ensure proper alignment and sealing.
Step-by-step explanation:
The threshold of a door is the bottom part that sits at the floor's level, forming a seal to prevent drafts, water, and debris from entering. To adjust the threshold, shims or screws can be employed. Shims, typically made of wood or composite materials, are inserted beneath the threshold to raise or lower it, addressing uneven gaps or misalignment.
Alternatively, screws can be loosened or tightened to achieve the desired height. Proper adjustment of the threshold is crucial for energy efficiency, weather resistance, and overall functionality of the door.