Can direct objects be in prepositional phrases?

Yes, they can! For example, the prepositional phrase, to the store, has an object in it, which would be the store.

the answer is emerged from.

orpheus descended to hades, the world of the death to rescue eurydice. no mortal had ever done this before him, he survived because he was protected by the gods. the word "underworld" gives us a clue, he emerged from it like a whale emerges form sea for exemple.

the power of