Final answer:
The stage in the lifecycle of social movements where stabilization occurs is called the 'institutionalization stage.' It signifies that the movement has become established and typically includes a paid staff.
Step-by-step explanation:
Stages of Social Movements
When considering field change theory in the context of social movements, the term used to identify the stage when stabilization of a change occurs is the institutionalization stage. Sociologists like Blumer (1969) and Tilly (1978) described the lifecycle of social movements, which includes the preliminary stage, where awareness of an issue forms and leaders emerge; the coalescence stage, involving organizations to publicize and raise awareness; followed by the institutionalization stage, signifying that the movement has become an established organization, often with hired staff, marking the stabilization of the movement. Lastly, the decline stage occurs when interest wanes, a new movement takes precedence, or the goals have been accomplished.