Describe the conditions indicated by a "low-pressure system."

A low-pressure system is characterized by a variety of unstable weather conditions that typically include increased cloud cover, precipitation, and strong winds. This system forms when the atmospheric pressure in an area is lower than that of its surroundings, leading to rising air. As the air rises, it cools and can condense into clouds and precipitation. Consequently, the presence of a low-pressure system usually indicates that the weather will be more dynamic and potentially severe. This can result in rain, storms, and a general lack of clear skies, which helps explain why the correct choice emphasizes the likelihood of unstable weather conditions commonly associated with low-pressure systems.