Bcz he had agreed to teach her to sing. Mozart was a great musician who was now dead, so she feels as if he has come back on earth just for her sake.

Reason for Naming the Frog Mozart
The nightingale called the frog Mozart because of its melodious voice and exceptional musical talent. This name was given to the frog as a form of admiration and recognition for its ability to produce beautiful sounds that resembled the music of the famous composer, Wolfgang Amadeus Mozart.

Musical Talent
The frog displayed a unique talent for singing and creating harmonious sounds, much like the renowned composer Mozart. Its vocal abilities were so extraordinary that the nightingale felt compelled to acknowledge this by naming the frog after the musical prodigy.

Resonance with Mozart
Mozart was known for his exceptional musical compositions and ability to create enchanting melodies that touched the hearts of listeners. Similarly, the frog's singing captivated the nightingale and evoked a sense of awe and admiration, prompting the comparison to the legendary composer.

Symbol of Excellence
By naming the frog Mozart, the nightingale celebrated its exceptional musical prowess and elevated it to a status of excellence in the realm of music. This name served as a tribute to the frog's unique talent and represented a form of artistic recognition within the animal kingdom.

Conclusion
In conclusion, the nightingale called the frog Mozart as a testament to its remarkable musical abilities and as a way of honoring its talent in creating beautiful sounds. This name symbolized the frog's exceptional vocal skills and underscored its status as a musical virtuoso in the natural world.