Understanding Metaphors in Clara's Journey

In a quiet town surrounded by whispering pines, a young girl named Clara often felt as if she were a bird trapped in a cage. Her dreams soared high above the clouds, filled with bright colors and melodies, but her reality was a landscape of mundane routines and unchanging seasons. Every day, she would stare out the window, watching the world beyond, where laughter danced like fireflies and adventure beckoned like an open door.

One evening, as the sun dipped below the horizon, painting the sky in hues of orange and purple, Clara whispered to the wind, “Set me free!” The gentle breeze enveloped her, as if it understood her heart's desire. In that moment, she imagined herself not just as a caged bird but as a phoenix, destined to rise from the ashes of her stagnation and reclaim the vibrant life she yearned for.

This metaphor of the phoenix embodies her hopes and dreams, contrasting with the earlier imagery of the caged bird. What literary device is primarily illustrated in Clara's transformation from feeling like a caged bird to envisioning herself as a phoenix?