The preterite expresses an action in the past that is defined. An Imperfect preterite expresses an action in the past that is NOT defined.
Sandra Cisneros es una escritora que usa su herencia mexicana como una fuente para describir la vida de inmigrantes mexicanos en Estados Unidos.
ANSWER una fuente
Una fuente = a source : it is a person or thing that supplies information
El Grito de Dolores starts around 2:30 am. Your answer would be 'in the morning'
Nothing happened that date its just asking you to translate