The term used to describe the scale of noise intensity from mild to very intense is:

• A. Hierarchy of Intensity
• B. Hierarchy
• C. Intensity Gradient
• D. Noise Scale

Answer: (A)

The concept here is describing a structured, level-based progression of stimulus strength. A term that clearly communicates an ordered set of levels from mild to very intense is “Hierarchy of Intensity.” It signals that there are distinct, ranked levels of noise, arranged in a ladder-like system. Other options are less precise: a generic hierarchy doesn’t link specifically to intensity levels; an intensity gradient emphasizes how quickly or slowly intensity changes between levels rather than naming the set of levels; a noise scale is a broad label that doesn’t inherently convey a tiered structure. So the most accurate description for a scale moving from mild to very intense is a hierarchy of intensity.