Final answer:
The question pertains to Opal and Winn-Dixie from the book 'Because of Winn-Dixie'. Both characters have experienced abandonment which brings them closer together.
Step-by-step explanation:
The question "What did Opal and Winn-Dixie have in common?" likely refers to the characters from the book Because of Winn-Dixie by Kate DiCamillo, rather than the historical events provided in the reference information. In the book, both Opal and Winn-Dixie have experienced abandonment. Opal's mother left her and her father, and Winn-Dixie, a dog, was found in a supermarket after being apparently left behind. This shared sense of loss and the desire for belonging bring them closer together, forging a strong bond between them.