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

Low cloud cover can indicate a hazardous situation in aviation primarily because it often correlates with reduced visibility and can lead to the formation of weather phenomena such as fog or precipitation. When cloud cover is low, pilots may find themselves flying in or near clouds without clear visual references, which increases the risk of spatial disorientation. Additionally, low clouds can obstruct critical navigational landmarks and increase the likelihood of encountering turbulent air, especially during takeoff and landing phases.

In contrast, high visibility allows for better situational awareness and safety during flight operations. Similarly, steady wind conditions are generally more predictable and manageable, reducing the risk of sudden turbulence. Rapid temperature changes, while they can impact weather conditions, do not directly relate to the immediate visual or navigational hazards presented by low cloud cover. Thus, low cloud cover is a clearer indicator of potentially hazardous aviation conditions.