Respuesta :
El niño is the boy ,la niña is the girl, el niño y la niña son differentes porque un niño tiene differente tipos de vida que las niñas los niños no van a tener vos de mujer y takpoco los niñas vos de hombre.(english: the boy and the girl are different because they have different types if lifes like a girl wouldnt have a deep voice nor a boy would have a squeek voice)
El Niño is a boy and La Niña is a girl. They differ because the ending is different, making one masculine and one feminine. :)