In chapter 7 Ender begins to feel homesick because he is worried about having friends that are girls will ruin his street cred. He also misses his parents and friends.
No no, I'm not joking that is the result I got from googling it and from reading it myself a year back.
I believe that the answer is his body will become a part of the earth, because 'bequeath' means to pass something on or leave to someone else, and he is leaving his body and letting it become one with the earth.
