Answer:
B and C
Explanation:
A) wrong because valley has nothing to do with the envoiorment,
B) correct beacsue the guly coast has heavy pollution problems in their water which can affect the air and that air travels over mexico city
C) correct, a big population can equal alot of litter!
D) wrong theyre has been some left over from that but thats not really quite dealing with the question
Answer:
America changed from a relatively isolationist country to a member of the world.
<span>When the war finished, America set out on a mission to build 50 new Battleships. America's involvement in WW1 showed us to be a world power and with that, each president going forward accepted that to be true.</span>
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<span>Hope this was helpful!</span>
2,500,000 bc, 10,000 bc, 8,000 bc, 3,500 bc, 3,200 bc.
Answer: first computer and antibiotics/ vaccines
Explanation:
these are major in <em>my opinion</em>
But I HOPE this helps
