What describes a traveling atmospheric low-pressure system?

A traveling atmospheric low-pressure system is accurately described as migratory lows. These systems are characterized by areas of low pressure that move across the surface of the Earth, typically associated with cloud formation, precipitation, and changes in weather conditions. Migratory lows are crucial in the weather patterns of many regions, contributing to the dynamic nature of the atmosphere.

The other options represent different meteorological phenomena. Santa Ana winds are strong, dry winds that occur in Southern California and are primarily influenced by local topography rather than being defined as traveling low-pressure systems. Prevailing westerlies are winds that blow from the west and are consistent in certain regions but do not encapsulate the concept of a low-pressure system itself. Trade winds refer to the easterly winds found in the tropics that are a part of the larger circulation patterns of the Earth and are not low-pressure systems either. Thus, the term migratory lows distinctly captures the essence of traveling atmospheric low-pressure systems.