Are you asking how are they made or What part of the building is important
The answer to this would be A, because they began to spread westward once they decided to head away from the Arctic.
Answer:
it is 100% false hope it help have a good day go adopt a puppy :)
Explanation:
B. It forms part of the border between Mexico and the United States. Mexico is far south, and the great lakes are way up north by Canada.
Just learned this the 5 stages are
fixation or volatilization, mineralization, nitrification, immobilization, and denitrification.
Hope this helps