Answers:
1. The counter interval is the yellow box. A contour interval in surveying is the vertical distance or the difference in the elevation between the two contour lines in a topographical.
2. Downs stream. (Due to the picture 1)
3. Red circle is the steepest (GIS or geographic information system is a computer system that allows for visualizing, manipulating, capturing, and storage of data with associated attributes. GIS offers better understanding of patterns and relationships of the landscape at different scales. Tools inside the GIS allow for manipulation of data for spatial analysis or cartography.)
4. A topographic map would represent the shape and profile. choose the bold counter interval lines that have elevation marking just like the yellow area.
5. x.D y.C w.A z.B