Final answer:
The term 'ruckus' refers to a noisy commotion, which is the correct answer between calm, silence, tranquility, and commotion, with 'commotion' being synonymous with ruckus.
Step-by-step explanation:
The term ruckus refers to a state of commotion, which is the opposite of calm, silence, or tranquility. It is often used to describe a noisy disturbance, similar to a hubbub, cacophony, or the loudness of a crowd. When discussing the loudness of sound in a technical context, such as in acoustics, the term used is intensity level or decibel, not ruckus. However, ruckus is the more appropriate term when describing a noisy situation in everyday language.