The intensity of light turbulence is best characterized as:

The characterization of light turbulence as slight and erratic accurately reflects the nature of this type of turbulence. Light turbulence typically results in minor, unpredictable variations in the aircraft's altitude and trajectory that may cause a gentle bumpiness but do not pose a significant risk to flight safety or passenger comfort. The term "slight" indicates that the disturbances are minimal, while "erratic" refers to their unpredictable nature, which can vary in frequency and intensity but remains low overall.

In contrast, severe and chaotic turbulence would imply aggressive and dangerous conditions that significantly affect the aircraft's control and safety, which does not align with the characteristics of light turbulence. The phrases "consistent and stable," and "extreme and disruptive," similarly indicate conditions that can be more intense or predictable than what is experienced in light turbulence. Therefore, slight and erratic best encapsulates the experience and effects of light turbulence during flight.