What does understory mean in the rainforest mean?

How any bridges cross the river Congo? What is one early civilization near the great lakes? What was the use of Stonehenge? Which Tomas explorer hid a clue in Victoria falls? What is an example of modern ocean monitoring equipment? What words describe London's Tower Bridge? Where is constinople located? What is the name of the plaza across from the Eiffel tower? When was Spring Mountain Ranch State Park created? Is Lake Nasser in Upper Egypt? Where does the open-water zone of lake end? What was the theory for resolving the problem of producing the statues all year round? Too much of what causes a river to flood? Does the limpet live in the sandy beach or rocky shore? What phrase describes the Great Lakes? Who was the 500 th person to jump off the Golden Gate Bridge? What is the pedestal footing? What state has the Salt river? Where is the mouth of Vistula? Describe the four layers of the rainforest?