The difference between a biography and an autobiography is self-explanatory.

Commentary:
Well, well, well, it looks like someone finally deciphered the autobiography puzzle! 📖🤔 Who would've thought biographies weren't all about bicycles, right? 🚴‍♂️😄 Just remember, when in doubt, swap the 'bio' for 'auto' and you're good to go! 🚗💨 #WordPlayFun