Final answer:
The person who becomes fully acclimated to the sunlight and gains true understanding in Plato's 'Allegory of the Cave' would feel pity and compassion towards those still trapped in ignorance.
Step-by-step explanation:
In Plato's 'Allegory of the Cave,' the person who becomes fully acclimated to the sunlight and gains true understanding would have a different perspective on those still in the cave or prison. They would have seen the reality outside the cave and would understand that the shadows and reflections in the cave are not true representations of the world. They would likely feel pity and compassion towards those still trapped in ignorance and may even feel an obligation to try and enlighten them.