Blowing air into a whistle causes air to vibrate inside the whistle.
Sounds are caused by vibrations in the air.
Blowing into a whistle causes sound.
What does blowing into a whistle do?
Options:
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