Question

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Answer 1

Mechanical waves need material stuff to travel through.

They cannot travel through vacuum.

That's why we can't hear the explosions on the sun.

That's also why astronauts standing on the moon or working outside the Space Station have to use radio to talk to each other, even if they're only a few inches apart.  There's no air between them, or any other material stuff.  So sound can't travel between them.

Answer 2

They can travel through a medium