What best describes irritability?

Irritability is best described as easily triggered anger or annoyance. This emotional state often manifests as a heightened sensitivity to perceived injustices or inconveniences, leading individuals to react more intensely than usual to minor provocations. While it can be associated with stress, anxiety, and other emotional disturbances, irritability is specifically characterized by a propensity to become upset or frustrated quickly, indicating a lower threshold for emotional regulation. This distinguishes it clearly from the other options, which represent different emotional states and reactions, such as extreme joy, apathy, or heightened sociability, none of which align with the defining features of irritability.