What characterizes a stationary front in meteorology?

A stationary front is characterized as a boundary that separates two air masses that are relatively equal in temperature and pressure, which leads to little or no movement of the front itself. This condition often occurs when neither of the air masses has enough energy to displace the other. As a result, weather associated with stationary fronts can be prolonged, leading to sustained precipitation and cloudiness over the area.

Understanding this allows meteorologists to predict weather patterns, as the presence of a stationary front can lead to extended periods of gray, rainy weather without significant changes in the surrounding temperatures. The other options describe different types of fronts or weather systems that do not accurately reflect the behavior and characteristics of a stationary front.