I am not sure of the answer but it is not a delta since a delta need not be marshy and the question asks about marshy land.
.21 yards of sand will fill an area 115 inches by 67 inches to a depth of 2.5 inches.
it depends how thickly you lay it.
144
in scan line polygon fill, each can line crossing a polygon, the area fill algorithm locates the intersection point of the scan line with the polygon edges. These intersection points are then stored from left to right and the corresponding frame buffer positions between each intersection painr are set to the specified fill color.In boundary fill, approach to area filling is to start at a point inside a region and paint the interior outward toward and the boundary.
Swamp?
That is a swamp
jamestown
I am not sure of the answer but it is not a delta since a delta need not be marshy and the question asks about marshy land.
swamp
Because a cactus can't grow in clayey soil and there is a lot of water in the marshes, the cactus does not need a lot of water
Wetland
A bog.
Fen
fens
a delta
marshy birds