Answer:
The Ring of Fire contains approximately 850–1,000 volcanoes that have been active during the last 11,700 years (about two-thirds of the world's total). The four largest volcanic eruptions on Earth in the last 11,700 years occurred at volcanoes in the Ring of Fire.
Explanation:
Label A: Phosphate Group
Label B: Five-carbon sugar
Label C: Nitrogenous Base
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The rock cycle is not a typical pattern found in the Earth system.