Question

1. what characteristic of the wave changed when changed the pitch?

wavelength
amplitude
starting position
frequency

Explanation:

• Wavelength: Wavelength is related to the physical length of the wave and is not directly associated with pitch.
• Amplitude: Amplitude determines the loudness of a sound wave, not the pitch.
• Starting position: The starting position of a wave has no bearing on its pitch.
• Frequency: Frequency is the number of wave cycles per second. In sound waves, a higher frequency corresponds to a higher - pitched sound, and a lower frequency corresponds to a lower - pitched sound.

Answer:

frequency