1pc
Ocean waves, sound waves, and waves on a string are all examples of
_waves *

i believe it is b. what was the cause of the big bang

hope this !

a straight line sloped

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

talk back to him about the sport and show him your expertise or leave the room