Which term is associated with loyalty to a cause or group?

The term that signifies loyalty to a cause or group is allegiance. This word encapsulates a strong commitment or devotion to a particular belief, organization, or ideology. Allegiance implies a sense of duty and loyalty, which often involves a willingness to support and advocate for the cause or group in question.

In contrast, the other terms do not convey this same sense of loyalty. Apathy refers to a lack of interest or concern, indicating a detachment from any cause. Indifference also suggests a disinterest, where an individual does not show any strong feelings or commitment. Complacency denotes a feeling of self-satisfaction, especially when accompanied by a lack of awareness of potential dangers or deficiencies, but it does not imply loyalty or support for a cause. Thus, allegiance distinctly highlights the aspect of loyalty that the question seeks.