To see if correction fluid has been used on a document it can be put in front of a light and the area will appear opaque

True.

Explanation:

Correction Fluids is a substance used to cover dalitography, writing or drawing errors containing a particulate opacifying agent, a water dispersible binder. During an investigation (even forensic investigations) to verify that correction fluid has been used in a document, it can be placed in front of a light and the area will appear opaque as it contains a particulate opacifying agent.

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explanation:

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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