How can leadership approaches, and a leader’s characteristics, influence practice change?

Construct a 3,500 word essay that addresses the following question using evidence-based literature:
How can leadership approaches, and a leader’s characteristics, influence practice change?

You may write about similar leadership characteristics or styles that complement each other, or prefer to compare and contrast two different leadership approaches.

I wish to mainly discuss Transactional Leadership and Transformational Leadership, but want to argue the point that. Different leadership styles are appropriate in different situations, and that a good leader will be able to incorporate many different leadership styles/characteristics into their practice. This is because different situations and different people require different leadership styles.