Final Answer:
The correct option is B. Self-tapping because these screws create their own threads during installation, eliminating the need for pre-existing threads.
Step-by-step explanation:
Self-tapping screws are designed to create their own threads when screwed into a hole, eliminating the need for pre-existing threads or a tapped hole. This is achieved through a cutting edge or flute on the screw that allows it to carve into the material as it is turned.
Unlike traditional screws that rely on a pre-made thread in the material, self-tapping screws are particularly useful when working with materials like metal or plastic where creating threads beforehand may be challenging or impractical.
The self-tapping feature facilitates ease of installation, making them a preferred choice in various applications, including construction, automotive, and assembly.
These screws are commonly used in scenarios where efficiency and convenience are paramount, allowing for quick and secure fastening without the need for additional tools or preparation.