You can use process of elimination here. The atmosphere is a key component for the air we breathe. The atmosphere protects us from harmful objects and rays. Finally, warm air has more moisture in it than cool air (for example why generally hot places are so humid).
Answer:concentrates
Explanation:amos Zacharyheath55
Answer:
The United States imports and exports products from / to the BRICS countries, so that changes in trade flows between the BRICS countries also have economic effects on the United States.
The best answer to go with is b