Explanation:
Nonfiction books are grouped together by subject to make it easier to find a book related to a specific topic. The system that most libraries use to organize books was invented by Melvil Dewey and it is called the Dewey Decimal System. Each book is assigned a three-digit call number based on what the book is about.
Silk Road in Western Han Dynasty (206 BC–24 AD) From 139 BC to 129 BC, Zhang Qian set out on his journey to the Western Regions twice, pioneering the world-famous route.
On beaches. beaches have sand and other rocks that make up conglomerate :).
By The German Radio. Back In WW2 Germans Were Forbidden To Use Radios Other Than The Ones Given To Them By Hitler. ( If They Were Caught With Outside World Radios They Were Killed) The Nazi Radio Transmitted The Laws And German Victorys And Other News