Top line: Which one is different and why?
The book is different, the lemon, the pineapple and the orange are fruit but the book is not.
Middle line: Which one is different and why?
The tiger is different. The shark, the fish and the dolphin all live in the water but the tiger doesn't.
Bottom line: Which one is different and why?
The doll is different. The scarf, the hat and the jacket you wear, but you don't wear a doll.