Which of the following describes one of the essential qualities a leader must embody?

A leader must embody strong and honorable character as it serves as the foundation for trustworthy and effective leadership. When a leader demonstrates integrity, honesty, and ethical behavior, they inspire confidence and respect from their team members. This creates a positive environment where individuals feel valued and motivated to achieve collective goals. A strong character also means making decisions that are fair and just, which further solidifies a leader’s credibility. By exemplifying these qualities, a leader not only guides their team with authority but also fosters an atmosphere of accountability and respect, encouraging others to emulate these behaviors.

The other choices do not reflect the essential qualities of an effective leader. Constant availability might seem supportive but could lead to burnout and does not hinge on the leader's character. Being self-centered and ambitious contradicts the principles of serving the team and prioritizing their needs. Lastly, indifference to challenges undermines a leader's role as someone who is supposed to face and navigate difficulties, thereby diminishing their effectiveness.