C. theory is the answer to your question
Answer:
the answer is no a thanks
Gaurd cells are high for exchange of gad
Because the soil didn't have the same nutrients it has now due to lack of decomposition of other plants and animals.
Answer: Sustainable
Explanation:
Once a product can serve the present moment and remain useful for an indefinite period without polluting the environment, or getting reduced in value, it can be said to be SUSTAINABLE.