Final answer:
The supervisor is using a transformational leadership style that adapts to the evolving competencies and needs of the workers.
Step-by-step explanation:
When the supervisor modifies their leadership approach based on the readiness level of workers, transitioning from high direction and support to less direction and eventually reducing even support, they're exhibiting transformational leadership style.
This style is characterized by adjusting leadership behavior to meet the individual needs of group members, helping them grow and perform effectively within the organization.
Transformational leaders are seen as charismatic, inspirational, intellectually stimulating, and considerate, capable of changing their approach for the benefit of the organization and its employees.