Respuesta :

1)qu------------car

2)gu--------------gar

3)c------------------zar

This could be to show how some sounds need to have different spelling  in order to maintain the same sound

Empezar------------empecemos(change from z to c)

        z+a,o,u     c +e  ,i

Jugar---------------juguemos  (from g to gu)

g +a o u             gu + e ,i

 Embarcar-----------embarquemos(from c to qu)

c+a,o,u      qu+ e,i