it helps citizens understand how they can influence the government. (in civics class right now ^^)
"<span>D. Travel became difficult and dangerous as lawlessness increased and roads fell into disrepair" is the best option from the list, although this wasn't universally true. </span>
I would say the answer is - D. rain forest
Hope that helps :P<span />
Trade flourished because these progressing empires were developing new ways to produce products and utilize agriculture in their areas, such as Han with silk and Rome with olives and fishing/seafaring. These empires has never had access to goods that were from other areas before the Silk road, causing trade to become immensely popular and relied upon.
