Final answer:
The best explanation for how Ursula K. Le Guin transforms the original myth in her retelling of The Aeneid is that she tells the story from Lavinia's perspective, affording new insights into gender and agency.
Step-by-step explanation:
The transformation of original myths by modern storytellers often serves to provide new perspectives and address contemporary issues. For the retelling of the story of The Aeneid, Ursula K. Le Guin's adaptation is an example of such a transformation. In this case, the correct statement that best explains how the modern story transforms the ideas of the original myth is: Le Guin tells the story of The Aeneid from Lavinia's perspective.
By shifting the focus to a minor female character, Le Guin is able to explore themes of gender and agency within the confines of the mythical narrative shaped by patriarchal values. Her approach reflects the trends in ancient poetry where increasing space is given to female voices, albeit through the lens of male authors, which allows for a nuanced conversation about gender, identity, and societal roles.