The correct response that best captures how Tarzan's experience with Kulonga after killing him challenges his understanding of his own identity is:
A) His jungle upbringing makes him accustomed to eating his victims and enemies, but his humanity makes him question the morality of eating another human being.
This response highlights the internal conflict Tarzan faces between his animalistic instincts shaped by his upbringing in the jungle and the moral implications of his actions as a human, ultimately challenging his understanding of identity.