Higher!” said Isaac, and Casey jumped higher. In fact, he jumped really high. He was like a big, furry grasshopper. Isaac was amazed. Maybe Casey could be a real show dog. Maybe he could be in a circus or something. In the simile from the excerpt, Casey is being compared to a robot. circus. dog. grasshopper.
The word "like" gives away that this sentence is a simile. Further, all other examples include "could be a," thus decreasing the likelihood that these are the answers.