What characterizes a low-pressure system?

A low-pressure system is characterized by air that rises and creates clouds. In meteorology, low-pressure systems are associated with rising air, which leads to cooling, condensation, and the formation of clouds and precipitation. As the air rises, it creates an area of lower pressure at the surface, which is balanced by the surrounding higher pressure areas. This rising air is crucial in the development of weather phenomena, including storm systems and precipitation.

The other options touch on different aspects of atmospheric conditions that do not align with the characteristics of a low-pressure system. High temperatures are typically found in high-pressure systems, while widely spaced isobars indicate weak winds associated with high-pressure systems. Stable air masses generally lead to clearer skies and minimal precipitation, which contrasts with the active and often unstable weather patterns of low-pressure systems.