Which of the following is a primary responsibility of a barber?

The primary responsibility of a barber is providing hair cutting and grooming services. This encompasses a variety of tasks essential to the role, including cutting, styling, and shaping hair, as well as offering services like beard trimming and hair coloring. Barbers are trained to work with various hair types and styles, ensuring clients receive personalized grooming that meets their needs and preferences.

While other options involve aspects of personal care, they do not align with the core duties of a barber. Conducting health assessments and performing surgeries are roles specific to healthcare professionals, while offering skincare treatments is typically the domain of estheticians or skincare specialists. Thus, providing hair cutting and grooming services clearly stands out as the primary focus of a barber's profession.