Which best describes the basis of european or western culture? 1. the slavic language and culture 2. greek philosophy, roman law, and the judeo-christian tradition 3. the protestant, jewish, and islamic religions 4. collectivism, revolution, and communism

About the first option: It's false because Slavic language and cultures are more typical for Eastern Europe.

About the second option: yes, this is correct! it's a very good description of the Weterneuropean culture.

Options 3 and 4 are false as neither for exampe Islam nor communism are inherent to Western Europe. 

It should be at the center of any map going vertically: the prime meridian, as it passes through greenwich,  england, is considered 0 degrees longitude