Which of the following does NOT represent a cloud amount abbreviation?

The abbreviation that does not represent a cloud amount is THC. In meteorological terms, cloud amounts are typically represented by specific abbreviations that denote the quantity of cloud cover observed in the sky. For example, "FEW" indicates a few clouds present, "BKN" signifies broken clouds, and "NSC" stands for no significant cloud cover.

THC, on the other hand, is not a standard abbreviation used in this context; it may stand for something else in different fields but does not represent a quantifiable measure of cloud cover. Recognizing the appropriate meteorological symbols and abbreviations is crucial for accurate weather reporting and understanding sky conditions.