Que pasa, despues de que miguel descubre la verdad de las canciones ( coco movie)

Does anyone know what my spanish teacher means by this? i need to use plural forms of the verb ser. and she asked me to use a couple of adjectives to describe the boys collectively and then the girls collectively?

Fill the blank with a la, a las, a los, or al. mi padre .

What do older generations teach to new ones in paraguay