What term describes a signal that has a continuous range of values?

A signal that has a continuous range of values is referred to as an analog signal. Analog signals are characterized by their ability to vary smoothly in response to changes in the information being conveyed. This means that instead of being restricted to discrete levels, an analog signal can represent an infinite number of values within a given range. This continuity allows analog signals to faithfully represent physical phenomena, such as sound waves or light intensity, which themselves vary continuously.

In contrast, digital signals encode information in discrete values, usually represented as binary (0s and 1s), which limits the representation to specific predefined levels. This fundamental difference in how information is represented is what distinguishes analog signals from digital signals.

Options like crosstalk and resistance are not directly related to the nature of signals in terms of continuous versus discrete values. Crosstalk refers to unwanted interference between telecommunications circuits, and resistance is a measure of how much a material opposes the flow of electric current. Thus, the term that accurately describes a signal with a continuous range of values is indeed the analog signal.