Direct object introduced by the preposition "a"
The direct object is not introduced by the preposition "a" when it refers to things or objects.No vio el coche y fue atropellado.
He didn't see the car and got hit.
However, it is introduced by the preposition “a” when it refers to people.
Vi a Lorena en el cine la semana pasada.
I saw Lorena at the movies last week.
There's a phenomenon called "la personificación" which consists