Well, both of them have a head of government, both run off of constitutions, and often constitutional monarchies have elected officials similar to a republic.
The answer here is meta-analysis.
We can see here that Dr O'Connor is using meta-analysis because she is examining the 170 studies that have been done on the topic to find out the truth that lies behind theses similar studies. Meta-analysis in essence is a statistical analysis done on the results of the previous studies on a certain topic or in a certain field as it combines all of those findings to get an overall result.
The correct answer is 2 million light-years
Explanation: Cataloged as M31 in the Messier catalog and NGC 224 in the New General Catalog (from the New General Catalog), the Andromeda galaxy is located in the constellation with the same name and, as already mentioned, at a distance of approximately 2.5 million years -light from Earth.
Push factors:
Hunger in eastern Europe and Russia forced immigrants to emigrate
People in poorer countries were often forced into slave labor
Immigrants came from countries with little or no government system
Pull factors:
The united states had many jobs for immigrants
the United States had a democratic government
The united states was viewed as the land of the free
hope this helps please mark brainliest