Answer:
It explains why Esperanza does not want to be like her great-grandmother.
Step-by-step explanation:
Esperanza describes her great-grandmother as a horsewoman because she was born in the Chinese year of the horse. People who were born at these times were regarded as people of strength. Esperanza did not want to identify with this attribute even though she indeed had the qualities of a strong woman.
Esperanza was a young girl who did not want to be seen as different in the society but who was obviously not comfortable with some aspects of the society.