Which of the following emphasizes working effectively within one's area of expertise?

The focus on competence in social work emphasizes the necessity for professionals to practice within their areas of expertise. This principle underscores the importance of having the appropriate knowledge, skills, and training to provide effective services to clients. Competence ensures that social workers are competent in assessing client needs, implementing interventions, and evaluating outcomes, thereby promoting the welfare of individuals and communities they serve.

Being competent safeguards clients from potential harm that could arise from inadequate knowledge or skill. It reinforces the ethical obligation to continually enhance one's skills through education and training, which is vital in a field that evolves with new theories, research, and practices.

The other principles mentioned, such as the importance of human relationships, dignity and worth of individuals, and integrity, while crucial in social work practice, do not specifically address the need for professionals to focus on their areas of expertise. Instead, they highlight the value of relationships, respect for individuals' inherent worth, and adherence to ethical behavior, respectively.