Final answer:
The mysterious arrival of a new character creates anticipation that something big might happen in the story.
Step-by-step explanation:
The part of the story that creates anticipation that something big might happen is a) The mysterious arrival of a new character. When a new character is introduced in a story, it often creates intrigue and anticipation because the reader doesn't yet know how this new character will impact the plot and what role they will play.
It adds an element of mystery and excitement, and readers eagerly await to see what significant event or change the new character will bring to the story.