Final answer:
Seeing a psychotherapist is an example of an individual tertiary stress intervention, providing specialized assistance for existing stress-related issues.
Step-by-step explanation:
An example of an individual tertiary stress intervention is d. seeing a psychotherapist. Tertiary stress interventions are treatments used to manage stress-related issues that have already manifested and are aimed at recovery or rehabilitation. Options such as yoga classes, sick days and leave, and talking with friends and coworkers are often considered secondary or primary interventions designed to prevent or manage the presence of stress before it requires specialized treatment. Seeing a psychotherapist falls under tertiary intervention as it is a specialized service that helps to address existing mental health issues, such as those brought about by stress. Psychotherapy is a professional intervention that can involve various strategies, including cognitive-behavioral therapy (CBT), to help individuals develop coping strategies and recover from the adverse effects of stress.