4 estaciones
Invierno otoño verano
Y la primavera
Otoño
Vacaciones
Piscina
Invierno
Navidad
Don't use it when the direct object is an inanimate object.
This preposition is called the personal a because we only use it when referring to human beings! With any other direct object, it's totally superfluous. Compare these two sentences: Yo veo a una chica.
JUST GIVE ME POINTS ITS NOT HARD
Hacer means "to do" and is regular in every conjugation except in the "yo" form.
Un estuario es un cuerpo de agua, mientras que un delta es una masa de tierra. I said <span>An </span>estuary<span> is a body of water, while a </span>delta<span> is a landmass.</span>