Researchers have suggested that transformational leadership’s modern-day popularity might be due to its emphasis on and which fits the needs of today’s work groups, who want to be inspired and empowered to succeed in times of uncertainty.

intrinsic motivation ; follower development

Explanation:

Transformational leadership may be defined as the process which is used to transform and change people. It is mostly concern with ethics, long term goals, values and emotions, etc. It gives more importance to the elements of leadership.

According to the researcher, transformational leadership’s modern-day popularity might be due motivation or changes to engage that come from within as it satisfies the individual for engaging the development of others.

Thus the answer is ---

intrinsic motivation ; follower development