Which of the following is an example of a screw?

A jar lid serves as an example of a screw because it exemplifies how a screw mechanism operates. A screw is defined as an inclined plane wrapped around a central shaft, which allows it to convert rotational motion into linear motion. When you twist the jar lid, it moves up and down along the threads, allowing it to securely close or open the jar.

This functionality ensures that the contents of the jar are kept sealed, demonstrating the practical application of a screw's design in everyday objects. The twisting action is essential to this motion, showcasing the fundamental principle of a screw's design and utility.