Which of the following statements is not true? each variation in a theme-and-variations form is unique and may differ in mood from the theme. the form called theme and variations is widely used in the classical period, either as an independent piece or as one movement of a symphony, sonata, or string quartet. the recapitulation section is an important way for a composer to develop variations in a theme-and-variations form. in a theme-and-variations movement, a basic musical idea is repeated over and over and is changed each time?