What does the analogy "they are called harmonic tremors, perhaps because of their constant release of energy, like one long song played underground" from the paragraph mean?

Question

(1 point)
When little earthquakes occur, they
make sounds similar to music.
Much like background music, little
• earthquakes tremor underground
without much notice.
The tremors from small earthquakes
• follow unpredictable patterns, unlike musical meter.
The same amount of energy is
• released by music and small earthquakes.

Answer 1

The analogy "they are called harmonic tremors, perhaps because of their constant release of energy, like one long song played underground" suggests that the tremors from small earthquakes occur continuously and consistently, similar to how a long song would play without interruption. Therefore, the best interpretation from the options provided is:

Much like background music, little earthquakes tremor underground without much notice.