I'll give you a question, please answer with step-by-step reasoning process.
A bald eagle flew through the heavens above what conversely named erosion?\nOptions:\n- colorado\n- hells canyon\n- sky\n- south lake tahoe\n- central idaho

hells canyon
Canyon is a narrow valley between mountains.

Canyon is formed due to erosion of soil by river water.

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The final answer: hells canyon