Which statement is true regarding high- or low-pressure systems?

A low-pressure area, often referred to as a trough, is indeed associated with rising air. As air warms, it expands and becomes less dense, leading to lower pressure at the surface. This rising air forms clouds and can result in precipitation and stormy weather, making low-pressure systems generally conducive to unsettled weather conditions.

In contrast, high-pressure systems are characterized by descending air. As the air descends, it compresses and warms, inhibiting cloud formation and leading to clearer skies and generally fair weather. This creates a stark difference between the weather patterns associated with high- and low-pressure systems, with low-pressure areas being more conducive to storm activity.

By understanding these dynamics, you can better predict weather patterns and their implications for various activities.