The changes and conflicts that emerged as Americans developed a national culture are a "mode of governance, ideal of democracy and foreign relations policies."
The period in which the Americans began to develop national culture was around 1800 to 1848.
During this period, many Americans are moving away from slavery, embracing civil rights and other ideals of democracies.
Also, their foreign relations policies move towards expansion throughout the western hemisphere.
Also, there was conflict, particularly on the issue of slavery and suffrages, which led to the American civil war later in 1861 to 1865.
Hence, in this case, it is concluded that the correct answer is "mode of governance, the idea of democracy and foreign relations policies."
Learn more here: https://brainly.com/question/14310471
