South Africa's biggest export is...
iron
vehicles, aircraft & other vessels
chemicals

The inner planets mercury, venus, earth, and mars were formed by

Humans have built artificial levees along the mississippi river to protect themselves and their property from floods. however, these structures also modify inland and coastal regions by disrupting the natural flow of sediment. artificial levees along the mississippi river a. reduce the amount of sediment deposited on floodplains and increase the amount of sediment deposited at the river's mouth. b. increase the amount of sediment deposited on floodplains and decrease the amount of sediment deposited at the river's mouth. c. increase the amount of sediment deposited on floodplains and at the river's mouth. d. decrease the amount of sediment deposited on floodplains and at the river's mouth.

Which statements explain how lakes form? check all that apply. lava flows block a river. streams flow into shallow areas. groundwater feeds into low-lying areas. ice sheets leave depressions that fill with water. movement of earth’s crust creates low areas that fill with water.