What do deltas have?

What is the reason why tourist go to international destination? What current is a warm ocean current that flows completely around earth? A triangle-shaped area of land at the mouth of a river? What is the slipper shaped one celled animal found in ponds and lakes? What type of columns do the Colosseum have? Why does a deciduos forest have a variety of habitats? What happens to the Nile River in the Spring? Why is the Mississippi delta is shrinking? What did these people on the mount Rushmore have in common? Which lies west of greece-the ionian sea or the aegean sea? Who were the Liberty League? How can many different plants and animals live in same environment? Is South Dakota the only state west of the Mississippi River that begins with the word south? What desert area in the center of the Cordillera in the US is called the? Water in oceans lakes rivers and streams? What is Erie known for? Is the Strait of Gibraltar the entrance to the red sea? When was Eisenhower Tunnel created? In which country is the Dead Sea located? Can you use US dollars in Niagara Falls?