Final answer:
Lack of leadership skills and a management-by-exception style are characteristic of laissez-faire leadership, which trusts group members to self-manage and make their own decisions with minimal guidance.
Step-by-step explanation:
Leadership behavior that is characterized by a lack of leadership skills, such as management-by-exception style, is referred to as laissez-faire leadership. This type of leadership is hands-off, allowing group members to self-manage and make their own decisions. In contrast to other leadership styles like democratic or authoritarian, the laissez-faire leader typically steps back, offering minimal guidance and relying on the group's self-motivation and maturity to achieve goals. An example is an art teacher who provides materials but does not give specific instructions, trusting students to direct their own artistic exploration.