Question

How did the location of Constantinople help it grow wealthy and prosperous?
Reed
What does your text say? I'm sure the answer is there, if you read them. You'll find lots of information among these articles, too.

https://www.google.com/search?q=constantinople+as+trading+center&ie=&oe=
Ms. Sue
Constantinople, formerly Byzantium, is now called Istanbul. It's on the border between Europe and Asia. It also is directly between the Mediterranean and Black Seas.

https://thehistoryofbyzantium.com/maps/