Which of the following is a key element that characterizes a profession?

A developed code of ethics is indeed a key element that characterizes a profession. Professions are distinguished by their adherence to established ethical standards that guide the behavior and decision-making of their members. This code of ethics serves multiple purposes: it helps to maintain public trust, ensures accountability, and provides a framework for navigating ethical dilemmas that arise in practice. It signifies a shared commitment to high standards of conduct, professionalism, and respect for clients or patients in the field.

In contrast, other options do not align with the fundamental characteristics of a profession. Non-professionals evaluating the field does not indicate professionalism; rather, it suggests a lack of expertise. Commitment to self-interest undermines the altruism and service-oriented principles that are foundational to most professional roles, which often emphasize the well-being of clients and the community as a priority. Similarly, minimal skill and knowledge are incompatible with the essence of a profession, which is built on a foundation of specialized knowledge, training, and expertise that professionals continuously refine and expand through ongoing education and practical experience.