What is the most important source of american unity

This question forces the answer to come off as rather bias, so I’m going to try and be as factual as possible. The constitution and Declaration of Independence are very important, as well as having the freedom of speech and a diverse category of other freedoms that many other countries do not.

Hope this helps!

d. promised it other land

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.