Answer:
sound waves
Explanation:
when you speak the sound waves come from out of your mouth up to your ears past your ear drums. so you can hear the sound that you just created. like when you sing a song the words you say are sound waves and you can hear what you're saying
Good for you :D
Yayyyayayayyayayay
I LOVE IT!!!!!!!!!!!!!
they observed movements of nature directly and captured the momentarily changing effect of the lighting
