Final answer:
Catalina is isolated from everyone in a speech described in the given passage due to cultural differences and unfamiliarity with customs.
Step-by-step explanation:
The speech in which Catalina is isolated from everyone is the one described in the given passage. In this speech, Caitlin, an outsider, feels disconnected from Maria's family due to the cultural differences and unfamiliarity with their customs. The purposeful isolation serves to highlight the challenges and difficulties that can arise when someone enters a new environment or culture. It also showcases the importance of understanding and adapting to different customs in order to feel more included and comfortable.