To be frank, I don't think your question is specific enough, but I would say that the answer would be the Rocky mountains, or just mountains. those are the only major kinds of landforms I can think of
Answer:
Erie Canal Connects The Atlantic To Great Lakes, So It's C) Boats could move more quickly from the Atlantic Ocean to the Great Lakes
Answer: about 3.1 people per square kilometer, but varies with different locations. For example, the Australian Capital Territoy has the largest density of 171 people per sq km, followed bby Victoria (27), New South Wales (9.7), and Tasmania (7.6). Hope this helps :)
Answer: the elevation of any landform is measured by the ocean floor.