Answer – C (Using instruments that have not been calibrated).
When the integrity of an instrument’s calibration has been compromised (usually due to exposure to a shock, vibration, or physical damage), it needs to be calibrated; failure to do this inevitably leads to inaccurate measurement; this is a very common measurement error.
Answer:
Avoid putting oils in water, and don't put trash in it either.
size hence streams are little and rivers are bigger than streams because a stream connects between two or more rivers
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