Answer: We can not travel to the past. I mean you could think about the past but thats about it.
Answer:
Time, place, space, climate and noise are all examples of environmental communication barriers.
Explanation:
They are things that may interfere with the message(s) that is/are trying to be sent.
The answer is B because warming up helps to get the person ready for active movement. Without it, you could be cramping or feeling uncomfortable and possibly hurt yourself when doing the activity.