In late spring the sides of the cliffs echo with the music that is the music of tiny tree frogs. What is the best way to rewrite this sentence?
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In late spring the sides of the cliffs echo music, and it is the music of tiny tree frogs.

In late spring the sides of the cliffs echo with the musical echoes of tiny tree frogs.

The music of tiny tree frogs on the sides of the cliffs echo in late spring.

In late spring the sides of the cliffs echo with the music of tiny tree frogs.