I circulate around without a home, and can be both a friend or foe. I am essential for life but can also destroy. What am I?
Category: Science · Difficulty: medium
Hint: Think about the movement of essential resources.
Answer
A water current
Explanation
A water current is vital for ecosystems and can be helpful or harmful, while the other options relate to different contexts.
This is a medium science riddle — a moderate challenge for most people. The answer is A water current.
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