Hi Nanako, Good question! They are quite similar phrasal verbs but in this instance it is better to use: "They drew on their many years of experience to create this game." A more appropriate use of "feed off" would be something like this: She fed off the crowd's enthusiasm. Definition of feed off: to gain strength, energy, or support from (something) Think of "feed off" as taking energy from something and then putting it to good use. Think of "drawing experience" as taking good things from past experiences and putting it to good use. I hope that helps!