Mass media is communication so It depends on how we communicate with each other when anyone isnt close or it could be helping us with what the weather is so on...
Do you need help on the questions<em> about </em>them? I can help you with that!
Answer:
You could check the Google for that
It's C because kidneys remove and filter out waste from blood and urine.
A- is the answer :) goodluck! hope this helps!