The angel speaks of Babylon having been destroyed as if it had fallen. See how you translated this in [Revelation 14:8](../14/08.md). (See: [[rc://en/ta/man/translate/figs-metaphor]])
The pronoun "she" refers to the city of Babylon, which is spoken of as if it were a prostitute. (See: [[rc://en/ta/man/translate/figs-personification]])