What factor allowed artisans to thrive in the rain forest kingdoms?

What was the first beach found? How can an owl get water in the desert? What restrictions are placed on national historic homes? Role of river in meeting the city water needs? What do you eat when you go machu picchu? What is the nearest river basin to commerce? What was the name of the bomb that completely vaporized an island in the pacific? What is the country of the rine river? What word has 7 letters that answer to water flowing drip by drip from a pipe? What are problem affecting the rainforest today? Would a ruler who followed confucian or daoist ideas built the great wall? Where is the location of the lascaux cave? Is there going to be rio 2? What is the largest body of water in Iowa? Why is the Antarctic circumpolar current able to flow all the way around Antarctica without bending north or south? What products or resources are transported through the great lakes? Why is the Ohio River so important to the US? Are there any volcanoes in the Amazon Rainforest? What is a alliteration for beach? Is it true ocean water often has a lower salinity in warm areas than in cold areas?