When bart turns 4, he begins to find his mother sexually attractive. he wants to kill his father homer, so that he does not have to share his mother. according to freud, bart is experiencing the complex?

The correct answer is Oedipus/Oedipal complex.
This complex got its name after Oedipus, who married the woman he didn't know was in fact his mother, according to Greek mythology. Oedipus complex occurs during the phallic stage of development, when boys start developing manly characteristics and hormones.