Brazil's coastline is 7,491 km and Argentina's coastline is 4,989 km. If you subtract, it will be 2,502
Uluru is located in Australia and it's formation took place over 500 million years ago.It is composed of sedimenatry rocks called arkose.Rapid erosion of the mountains made materials that were deposited under the sea which formed uluru.Uluru is made up of very weldege rock.The top is flat and sides are grooved due to the process of weatheration.The red colour is due to the rusting of iron.The rock reacts with water and oxygen.
I'd guess b on this one. I don't know the definition of watershed, but the amazon is a pretty big expanse of water "stretching" a long way (albeit that water doesn't stretch).
