Form - A musical work’s shape, structure, and the organized arrangement of its elements – and how these elements are manipulated so that the work makes sense.
Repetition and Contrast - the duality in how musical elements are utilized.
Unitary Form - Usually a short song and has only one verse "Happy Birthday Song"
Strophic Form - Strophe in Greek means turning / Keeps the same melody for all the stanzas or verses