The document summarizes two leadership theories: situational leadership theory and Fiedler's contingency model. Situational leadership theory proposes that effective leadership depends on the readiness of followers and adapts leadership style based on follower maturity. Fiedler's contingency model states that leadership effectiveness depends on the interaction between a leader's style (task-oriented vs. relationship-oriented) and situational favorability based on leader-member relations, task structure, and leader power. Both theories argue against a single best leadership style and emphasize adapting to situational and individual factors.