Answer:
The United States and Canada are divided into a number of physical regions with distinct landforms. The western part of the region is marked by north-south mountain ranges in the Rocky Mountains and the Pacific Coast Ranges, with Intermountain Basins and Plateaus in between these ranges.
<span>along shorelines
First, look at the definitions involved.
hydrosphere - All the water on earth's surface such as lakes and seas.
lithosphere - The rigid outer part of earth's crust.
Now look at the available choices:
on mountaintops
* Bodies of water aren't too common up on mountain tops. Not a good choice.
inside glaciers
* Inside glaciers? Not touching earth, but lots of ice instead. Also not a good choice.
at volcanoes
* Not a lot of water here either. Bad choice.
along shorelines
* Sounds good. The boundary between water and earth. This is the right answer.</span>
Yes, geographers do study the growth pattern of world population; its a branch of geography called demography
