What it mean is Portion of the structure below ground level?

Does the Mississippi river mix with the gulf? Why was the gulf steam important? When alluvium accumulates as a long curving deposit of sediment on the inside of a stream meander it is called? Where is the World War 2 section of Arlington National Cemetery? Why is Stonehenge and the louvre were cool meaningful? What is the climax of through the tunnel? People living along the border of an undeveloped area? How do you keep a marble on the track of a marble roller coaster? What was special about the stone 80 yards or 73 meters east of the altar at Stonehenge? What group controlled the Mediterranean world and most of Western Europe during ancient times? Why were false chambers and dead-end passages built into the structure of the pyramids and why was this so important? What river was near to karbala which water supplied was cut off by army of yazid? What was the cost of damages for the 1887 yellow river floods? What is the size of Lake Pend Oreille? The first state west of the Appalachian Mountains to enter the Union was .? What cures have been found in the amazon forest? When we eat cows does it affect how much land they cut down in the rain forest? Why did the Red River resistance happen? Did they fire cannons at the motte and bailey castles? What is an indentation of shore called?