The city of Istanbul has survived for so long due to its favorable location. It was built at the tip of a peninsula with a natural harbor, offering protection from overland attacks. The flat, fertile, and well-watered land on the peninsula made it productive for farming, contributing to its longevity.

Rephrae this sentence in 7ty grade

Istanbul has lasted a long time because it was built on a peninsula with a good harbor and land suitable for farming, making it easy to defend from attacks.