I was asked this at one of my interviews and I mainly structured my answer around being prepared for a huge change/transition. I mentioned specific things about the school/surrounding area that I liked and felt would make the big move easier. Something I specifically said was that NYC reminds me a lot of my home in the Bay Area - lots of diversity, multitude of opportunities outside of the school, and constant hustling & bustling. But because I also mention in my PS that i'm super close to my family, I made sure to convince my interviewer that I was prepared, ready, and committed to become a dentist even though it meant moving 3,000 miles away bc my family will support me no matter where I go. Sounds cheese I know haha, but hey it worked!