The correct answer is: Exposition.
The background information is given, the author introduces Robert (one of the characters) to the story and tells us some of his characteristics, present or past. This information will be usefull throughout the story.
In the excerpt we can't any trace of a conflict yet, this means the answer is not rising action. It doesn't show any past climax that is starting to solve as it only gives characteristics of a character, therefore rising action is incorrect to. If we don't have any conflict yet, there can't be any resolution either.