In research methodology, the words proposition and hypothesis are often confused, and are often used with slightly different shades of meaning by different authors. However, the most popular view is that based on the existing literature in a field, a theory is built.
14 Where they live On a global scale, the sea eagle extends across the northern hemisphere from Siberia and Japan to Europe, and south to the Mediterranean and the Middle East. It is replaced by the bald eagle in North America, although it is the sea eagle that has colonised the southwest coast of Greenland.
The bald eagle's natural home is in most of North America, including most of Canada, all of the United States, and northern Mexico. The most bald eagles live near seas, rivers, large lakes, oceans, and other large places with open water and a lot of fish.