Which of the following conditions could indicate a hazardous situation in aviation?

Low cloud cover is indeed a condition that can indicate a hazardous situation in aviation. When cloud cover is low, it can significantly reduce visibility for pilots, making it difficult to navigate and safely operate an aircraft. Low ceilings can also affect the ability to conduct visual flight rules (VFR) flying, where pilots rely on visual references outside the cockpit, increasing the risks of in-flight errors or accidents.

In addition, low cloud cover is often associated with other adverse weather conditions, such as precipitation, turbulence, or icing, which can further complicate flying operations. Pilots must be vigilant and consider alternative flight plans when faced with low cloud cover to ensure safety.

The other options, while relevant to aviation safety, do not signal hazardous situations as directly or consistently as low cloud cover does. High visibility and steady wind conditions can often contribute to safer flying environments, while rapid temperature changes may affect aircraft performance but do not often indicate an immediate hazard on their own.