This part of the story represents the exposition.
Since this is the beginning of the story, we can instantly rule out all three of the other choices and here's why.
1.) Falling action occurs after the Climax (or the peak of the story/ main conflict).
2.) Climax is the highest point of action in a story, meaning that this is towards the middle rather than the first.
3.) Resolution is the ending of a story, or how an agreement or dissagreement was ended.
This leaves us with the exposistion, the beginning details with the least amount of action.
Hope this helps and have a nice day.
-Kaikai Kitan