The answer is concentration gradient. Have a good day.
Answer:
Fermentation
Explanation:
It does not make ATP, but it allows glycolysis to continue.
Clearing land is not a sustainable practice in any form, so not A. Crop rotation is important for maintaining soil fertility, but is not necessarily sustainable. It's definitely not C. It is likely D because using only renewable resources is top notch sustainability.
<span>inanimate non-living alive dead</span>