Final answer:
Leon, known for his team-playing ability and sensitivity, likely has high emotional intelligence, vital for effective leadership and empathetic team management.
Step-by-step explanation:
Leon, the leader of the sales team who is a good team player and sensitive to the needs and viewpoints of his team members, most likely possesses high emotional intelligence. This term refers to the ability to recognize, understand, and manage one's own emotions, as well as the emotions of others. It is a critical skill in leadership, as it enables individuals like Leon to communicate effectively, empathize with team members, diffuse conflicts, and lead by example.