What does blowing into a whistle do?
makes a sight makes sound causes disruption duplicate itself unidirectional decrease stamina makes hearing to move people
A B C D E F G H
Sounds are caused by vibrations in the air.
Blowing into a whistle causes sound.
What does blowing into a whistle do? (A) makes a sight (B) makes sound (C) causes disruption (D) duplicate itself (E) unidirectional (F) decrease stamina (G) makes hearing (H) to move people