What makes this song parody Amish paradise an allusion?

The song "Amish Paradise" by "Weird Al" Yankovic is an allusion because it parodies the song "Gangsta's Paradise" by Coolio. It mimics the original music and style while changing the lyrics to humorously depict the Amish way of life. This creates a connection between the two songs, playing off the familiarity of the original to deliver comedic effect.