Answer:
The personal a is necessary
Femenino:Tener cualidades o una apariencia tradicionalmente asociado con la mujer
Masculino: tener cualidades o tradicionalmente asociado con los hombres
O las mochilas would be or the backpacks not the backpacks
The translation is:
They are words that denote qualities or properties of nouns; The modify, so they provide a variety of meanings within a text
