Hi Liza, The meaning remains the same with either one. Each prepositional phrase expresses different information: "with his parents" (who else) and "in London" (where) If you consider two separate sentences: "He lives with his parents." and "He lives in London", both prepositional phrases are direct objects of the verb "lives", and the order does not matter. Just as a side discussion: (A) "He lives in London and works for his parents." Here each prepositional phrase is strictly the direct object of a verb. They are not interchangeable. (B) "He lives for his parents and works in London." If you try to swap their positions, the meaning is totally different (He stays alive only for the sake of his parents.) I hope this helps.

I think both of them is okay, , it depends on your first purpose about what kind of information that you want to deliver first

Both are okay, it changes a bit what you want to emphasize but the meaning is the same.