I keep things in check, but you can't see, my role is crucial for life and harmony. What am I?
Category: Science · Difficulty: medium
Hint: Think about what measures acidity or alkalinity.
Answer
pH levels
Explanation
pH levels indicate how acidic or alkaline a solution is, playing a critical role in biological processes.
This is a medium science riddle — a moderate challenge for most people. The answer is pH levels.
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