What does "erratic" imply about an individual's behavior?

The term "erratic" describes behavior that lacks consistency and unpredictability, often suggesting a tendency to deviate from the norm in a way that may also be considered eccentric or unusual. When someone is described as erratic, it means their actions or responses can vary widely without a clear pattern, making it difficult to anticipate how they will behave in any given situation. This unpredictability can stem from various factors and can manifest in both minor and significant ways.

In contrast, the other choices convey stability, predictability, and traditional behavior, which do not align with the meaning of "erratic." Therefore, the correct choice reflects the inherent unpredictability and eccentric nature that the term embodies.