What is defined as information or signals entered into a computer system?

The correct choice is input, which refers to any information or signals that are entered into a computer system for processing. This can include various forms of data, such as text entered via a keyboard, images captured by a camera, or selections made through a touch screen.

Input is crucial because it serves as the starting point for any computation or processing task a computer performs. By receiving input, the system can then utilize it to produce output—such as displaying results on a screen or generating a report. While terms like data, output, and storage are also relevant within the context of a computer system, they refer to different aspects of the computing process. Data pertains to the information itself, output describes the results produced by the computer, and storage refers to the saving of data or programs for access later. Thus, input specifically aligns with the act of entering information into a computer.