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meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

"it built up in the atmosphere"

i think thats it, idk, i tried looking for this exact q& a for grad. and idk if i got this question right or sorry if im wrong

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"

answer; /// the shaft of the hair consists of dead cells;