Final answer:
Without specific chapter summaries or details, it is not possible to accurately determine in which chapter of 'The House on Mango Street' evidence of family unity is found; however, Sandra Cisneros often includes themes of family in her work.
Step-by-step explanation:
The subject of the question is English, and it relates to the novel The House on Mango Street by Sandra Cisneros. When examining the chapters mentioned to identify where evidence of family unity is featured, it's essential to look at the context and events of each chapter. Unfortunately, without specific summaries or details of the chapters, it's not possible to accurately pinpoint the answer. However, Sandra Cisneros's writing often reflects themes of family and identity through her characters, as seen in her depiction of a young girl's experiences growing up in a Latino neighborhood of Chicago. If you have access to the text of these chapters, search for scenes showcasing family members supporting one another, gathering together, or overcoming challenges collectively; such instances would demonstrate family unity.