Sound cannot travel through a vacuum? why?​

Because Sounds need a medium to travel

Hope it helps

Sound travels by vibrating the particles in the medium so that they bump into each other. ... In the vacuum of space, there are no (or very, very few) particles to vibrate, so sound cannot travel through this medium.

answer; the correct answer is desert plants;

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .