D. exhausting a natural resource is not sustainable
Answer:
Freshwater, Ocean Water, and Terrestrial.
Explanation:
These are the broadest 'three types of ecosystems' that come to mind.
Answer:
Well for starters, your grade will not be an "A" no more, it would be less. It would be like a C or a C - Since you went from something higher than 95% to something lower than a 59.9%.
