I believe the answer is: serve at homeless shelters.
The help that given through a community service tend to target small/local area.
Service through army is for a nationwide area, so option A is wrong.
Signing up for peace corp is affecting world wide area, so option B is wrong.
Take part in teach America is a form of service with nation wide influence, so option D is wrong.
That leave us with serving at homeless shelters.
Answer:
a noble gas because it’s valence electron is full
2+8+8
Explanation:
D. Air pollution is not as much of a problem there
They are either christian or protestant