Answer:
To inform readers based on Tan's childhood experience.
Step-by-step explanation:
'Mother Tongue' is an essay written by Amy Tan. The essay talks about how Amy made use of different 'Englishes' in her work.
In the given excerpt Tan is talking about how her mother used to speak shorthand' broken' English. She informs the readers that the limited English that was spoken by her mother limited Amy's perception about her mother because she felt ashamed of the broken English she used to speak.
So, the purpose of including this text in the essay is to inform the readers about her experience with English in her childhood. Thus first option is correct.