Which of these songs does NOT play during the Ruins segments of the 2015 game "Undertale"?

The song "Another Medium" does not play during the ruins segments of the 2015 game Undertale. This is because "Another Medium" is played in the second area of the game called Waterfall. The other songs in Undertale that play during the ruins segments include "Anticipation," which plays during puzzles and exploration, "Enemy Approaching," which plays during battles, "Ghost Fight," which plays during the encounter with Napstablook, and "Heartache," which plays during the battle with Toriel, the caretaker of the Ruins.