Deltas, because volcanoes are a build up of composites, glaciers are from ice melting and leaving behind composites. Deltas are when composites are washed away until there is a whole or trench.
There’s no image but if there is something about an ice skater turning the rink then that is the answer
http://faculty.chemeketa.edu/afrank1/topo_maps/scale.htm use this website and i think this should fully explain it
The line would have to pass through at least two points.
Canadian shield is composed of Precambrian rocks that cover 2.8 million square miles.
