Direct characterization refers to the revelation of character by the author. In direct characterization, the character's trait is described by the author in a straightforward manner and highlights the character's motivation. Further to the audience, it reveals the character's personality.
Therefore, in the above options, the sentence which is an example of direct characterization is Zach and Marie hated each other.
In the above sentence, the author provides for Zach and Marie direct characterization that they hate each other.