To answer your question, we would need to know the specific content of the speeches given by the characters in the second part of the play that emphasize the theme of immigrants coming to America to escape difficult situations. However, based on typical narratives surrounding immigrant experiences, speeches by characters who likely discuss struggles, aspirations, and the quest for a better life would typically align with that theme.
If you have access to the specific content of the speeches mentioned, please share them, and I'll help you identify which two best emphasize the theme. Without that information, I cannot definitively select the two speeches.