Final answer:
Volunteering at a local shelter is a personal activity that job seekers might mention in a career portfolio as it showcases transferable skills such as leadership and teamwork.
Step-by-step explanation:
When mentioning a personal activity in a career portfolio, job seekers should choose activities that reflect skills or interests relevant to the job they are seeking. Option (C) Volunteering at a local shelter is an example of a personal activity that could be valuable to mention because it demonstrates community engagement and social responsibility, skills that are transferable to many job roles. Unlike the other options, which are hobbies, volunteering can show commitment, leadership, and the ability to work with others, making it a compelling addition to a career portfolio.