"Echoes" refers to the phenomenon where sound waves reflect off surfaces and return to the listener. This occurs when sound travels through a medium, such as air, and encounters obstacles like walls or mountains. The time it takes for the sound to return can create a delay, allowing us to hear the repeated sound, or echo. In addition to sound, the term "echo" can also apply to other fields, such as seismology, where it describes the reflection of seismic waves. In literature and art, "echoes" can symbolize the repetition of themes or ideas, creating a sense of resonance or connection between different elements.