Answer:
It represents her being and adult, and also childish.
Step-by-step explanation:
The question is an excerpt from a book titled house on the mango. And it is from Chapter 19, which is titled Chanclas
What Esperanza wears is a metaphor for her age because while the dress portrays her as being an adult, in way of her dressing. The chanclas portrays her as being childish instead.
This, is what makes it a metaphor