Which of these results is an advantage of the green garden technology shown in the picture compared with other gardening practices?
A. It conserves water.
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B. It prevents air pollution.
C. It prevents water pollution.
D. It conserves forest resources.

Where are the phrases

From a high concentration to a low concentration.

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.