I am a natural process that recycles nutrients, yet I am not a machine. What am I?
Category: Science · Difficulty: medium
Hint: Think about how elements are reused in ecosystems.
Answer
Nutrient cycling
Explanation
Biogeochemical cycles involve the movement of elements through living and non-living components, while the other options are individual processes.
This is a medium science riddle — a moderate challenge for most people. The answer is Nutrient cycling.
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