Which of the following is a low-tech interface example for computer interaction?

A low-tech interface for computer interaction is one that utilizes simple, straightforward tools or mechanisms to facilitate communication or control with computers. The option describing a weight on a hinge to depress a shift key exemplifies this, as it represents a basic mechanical solution designed to assist users in interacting with their devices without the need for advanced technology.

This type of interface is accessible and relies on physical mechanisms rather than complex software or hardware, making it ideal for individuals who may have limited access to or skill with high-tech tools. It allows for straightforward interaction by enabling someone to operate functions on a keyboard with minimal technological complexity.

In contrast, the other options involve more advanced technology or software systems. Word completion software for Braille input and voice recognition software both rely on specialized programming and digital processing, making them more complex and less "low-tech." Similarly, a typical computer keyboard, while it's a common tool, is also not classified as low-tech due to the presence of electronic circuits and its reliance on digital technology for operation.