Geographic isolation could be caused by a number of environmental factors. If a population of people or species live on an island, amongst mountains, in difficult to navigate terrain, or deep into rainforest or forests generally these groups could experience geographic isolation. Geographic largely occurs if a population or group of people or animals live in a remote region of the world that has little access to others due to any number of geographic features.
C. The Meiji Restoration. The Meiji emperor was restored as head of Japan in 1868 and his first priority was to tackle domestic reform by abolishing feudalism, which gave people much more freedom and security.
Of all the urbanized people of the Americas, the Incas were the most brilliant engineers. The correct option among all the options given in the question is option "b". The most important creation by the Incas was the roadways. Some of the roads had a length of the entire South American Pacific coast. To build cush brilliant roadways in mountainous regions required remarkable engineering skills.