Answer:
Oxygen (O2) concerntration
Temperature
pH

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The answer to this will be is : </h3><h2 /><h2>
C. Plant roots grow into a crack in a rock.</h2><h2 /><h2>

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Because "mechanical weathering" It's a example of the Plants roots that grow on into a crack in the rock.
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Most of the carbon that's stored in plants - and in anything that eats them - is released back into the atmosphere by respiration when the organisms die and are eaten by microbes.
The answer is B
Answer:
The water would get warmer and would not sink to the bottom, and therefore disrupt the worldwide currents
Explanation:
the warmer water is less dense than the colder water and would not sink, which would interrupt the natural currents with extra external heat added by global warming
Concentration gradient differs whether the solution is greater or lesser anticipating if it's hypertonic, hypotonic, or isotonic.