Answer:
Grover and Anna Beth prove they are real friends to Percy by standing by his side and helping him during his quest
Explanation:
When the Furies attack Percy, Annabeth and Grover help hold them off, even though they are not invisible like Percy and are in danger. This shows their bravery and loyalty to Percy, as they put themselves in harm's way to protect him. Additionally, Percy chooses to go on the quest with Grover because he knows it will help Grover get his searcher's license, and he invites Annabeth to go with them because he knows she has been waiting for the opportunity to prove herself. By inviting them on the quest, Percy is showing that he values their friendship and trusts them to help him on his journey.
I
