Some music makes us want to dance or move and other music doesn't. Why is that? It has to do with rhythm. There are an infinite variety of rhythms out there. What makes a rhythm feel "right"? It has to do with something we call the "downbeat". A downbeat is the beat you feel when you hear music. It's the hand clap or the toe tap you find yourself doing as you sing along. When you clap or move to the beat, your body is responding to the beat it's feeling in the music. We respond most readily to drums and bass (usually bass guitar) but you can feel the beat listening to almost any instrument. To understand a little bit about rhythm and why it makes us wanna move, we need to understand the basics of rhythm.
Rhythm can best be understood by counting. Here's a simple rhythm in "four" (meaning we count 1, 2, 3, 4, 1, 2, 3, 4, etc.):