Why London bridge is stable structure?

Why do seahorses live in a reef? What were the obstacles you would come across trying to attack a motte and bailey castle? How many players constitute a team in beach soccer? In which hand is the Statue of Liberty's torch in? What three countries are between the Black Sea and Caspian Sea? Is the Grand Canyon located in Yellowstone National Park? How long did it take to dig the Erie Canal? How much water is 8 oz? How long has the pyramid in Sacramento been there? What are the famous landmarks of galapagos islands? Why did farmers ship crops west toward the Mississippi River rather than directly east? How many islands are between the american and canadian falls and what are their names? How much does it cost to get into hersey park? In what year was the statue of liberty finally finished and standing where she belonged? Where is fresh water limited? What bodies of water does the Suez canal connect? Does x no way out at thorpe park go forwards and backwards? What is the largest tributary of the Ohio River? How large is the southern ocean? What do rivers sometimes causes in the spring?