The Correct answer is C. None of the other answers that are up there make sense.
Answer: B) Diatonic
Explanation: The major scale is one of the most commonly used musical scales, especially in Western music. It is one of the diatonic scales.
Edit: Armor for Fish? Srsly?
element ---1.Form
principle----2.value
element----3.texture
principle----4.movement
principle----5.unity/variety