Guide to taking care of an alien

For literacy, we had to read a book called I Spy. It is about an alien who is tired of just eating rocks so when two humans come to there planet they leave a mysterious red thing (apple) on the ground. The alien decided to try to grow it using there rock growing skills. The apple trees grows and they start eating apples. Once we finished reading we had to write a guide about something in the book. I decided to write a guide on how to take care of an alien. Would you use this guide if aliens were real?