Answer: between about 500 meters (1,640 feet) below the ocean's surface to about 6 kilometers (3.75 miles) above sea level. The biosphere has existed for about 3.5 billion years
Step-by-step explanation:
Answer:
About 20 kilometers
The biosphere is about 20 km from top to bottom. It has existed for about 3.5 billion years so it's pretty old
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