Which quotation from "Hansel and Gretel” is an example of a simile?

“They saw that the cottage was made of bread and roofed with cakes.”
“Suddenly the door opened, and an ancient dame leaning on a staff hobbled out.”
“After they had finished, two beautiful little white beds were prepared for them.”
“Then Hansel sprang like a bird out of a cage when the door is opened.”
.”