Based on this map, you can tell that the United States is a very diverse country. You can conclude this based on the number of racial groups that live here and on their distribution, as they are present all over the country. You can also see that the category of "multiethnic" covers a very large region, indicating that there are many more ethnic groups besides the major ones, and that they interact and engage with each other regularly.
The map shows america as a diverse country because It shows that the country is full of every major race. The largest being Multi ethnic even further proves it by showing that there is a majority of mixed races. America is one of the most diverse countries in the world and this map proves is by providing a visual representation of all the different races in the country. <span />
The courts use the constitution i believe to help with this. they use the constitution to show that the foreign policy issues should be resolved by that law/amendment.