Answer:
Renewable resources can be replenished, such as water. Non-renewable resources are limited, like oil. A sustainable option is one that can be reused without affecting the environment.
Explanation:
The answer to this question would be D.) Permafrost prevents penetration of deep roots.
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Your answer should be A. by observing the formation of sedimentary rocks.
I think what they rely on is there experiment and how they do it
I will have to say D) they keep the prey population low so they will be less likely to deplete resources such as food, water, and shelter... hope i helped!!