The fastest growing group of americans in 2005 categorized themselves as

Multi-racial  Americans are the fastest growing group in 2005.

Explanation:

Multi-racial Americans are among the fastest-growing society of demographics in America. There are few young, tolerant, and growing at the fastest speed than other populations. As America is divided because of race, different social groups are against interracial marriages. However, some multiracial adults are proud of their mixed-race lives; they also feel that their human race has given them open to other diverse cultures. Because of this, a high number of population is proud to have a multi-racial background.

for the 2 countries u can do china and america because america has a democratic government while china has a communist government.

a democracy is a government run by the people either by directly voting or indirectly by electing representatives. an oligarchy is a government run by a few or a small group of people. a democracy and oligarchy are similar because both in an oligarchy and an indirect democracy, a small group of induvial determine the laws for a large group of people they are different because in an oligarchy it is easier to control and they do not have to answer to a large number of people in the country, unlike a democracy where they do have to answer to a large number of people an county that is a democracy would be the united states. a country that is an oligarchy would be the china.