414,132 views
33 votes
33 votes
........................................................................answer?

........................................................................answer?-example-1
User Imperishable Night
by
2.7k points

1 Answer

8 votes
8 votes
first one is B,
second one is they are transverse and need to travel in a medium

third one is the first one because they vibrate as they move in a vacuum!!
User Cloy
by
3.0k points