Final answer:
The yoga studio uses the appeal to pathos by associating their classes with emotions of calm and peace to attract the audience.
Step-by-step explanation:
In the provided scenario where a yoga studio promotes their classes by associating them with feelings of calm and peace, the technique used to appeal to the audience is pathos. Pathos is a rhetorical appeal to the audience's emotions. The studio's marketing strategy is designed to evoke feelings of serenity and tranquility, which are common emotional responses people seek from yoga. By tapping into these emotions, the yoga studio aims to persuade people to attend their classes in search of those feelings.