Why does Esperanza want to work so badly chapter 9

The day after taking Mama to the hospital, Esperanza approaches Miguel to see if she can get a job in the fields. She is desperate for the money to help with the hospital bills, and even offers to disguise herself as a boy. However, Miguel explains that winter is not the time for picking crops and the only work available is removing the eyes from potatoes.

because her mother was so ill and she wants get abuelita back for make mama happy