The terms:Ascending Descending, Wave and Arc are all types of: a. Sound b. Contours c. Range d. Melodies

The correct answer is b. Contours.Contour refers to the shape and direction of a line or curve, and in music, it describes the overall shape of a melody or a musical phrase. The terms "ascending," "descending," "wave," and "arc" are all types of contours that describe the direction and shape of a musical line.An "ascending" contour refers to a melody or a musical phrase that moves upward in pitch, while a "descending" contour refers to a melody or a musical phrase that moves downward in pitch. A "wave" contour refers to a melody or a musical phrase that has a wavelike shape, with peaks and valleys, while an "arc" contour refers to a melody or a musical phrase that has a curved shape, like an arch or a circle.These terms are used to describe the overall shape and direction of a musical line, and they help musicians and composers understand the structure and character of a piece of music.