Final answer:
The commercial with a sad, shaking dog locked in a kennel uses pathos to appeal to the audience's emotions and prompt them to support the pet rescue charity.
Step-by-step explanation:
A commercial for a pet rescue charity that features a sad, shaking dog locked in a kennel uses the rhetorical appeal known as pathos. This appeal is utilized to evoke feelings of compassion and empathy from the audience. The use of such emotional content is designed to directly draw on the viewer's heartstrings, encouraging them to take action, often by donating to the cause.