Per Ger, what city is called "the mother of Gentile Christianity"?

Antioch church

Explanation:

Antioch church is called "the mother of Gentile Christianity" . This city is found in Greece and was very instrumental in the propagation of the gospel of Jesus Christ ( Christianity) to the Gentiles. The Gentiles were known as non-Jews and Jesus being a Jew had large Jew followers.

The establishment of the Antioch church was pivotal in spreading of the gospel to the Roman Empire and other neighboring cities/countries of the world through the disciples.

b) the planets year length would be longer

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it depends on which society you are referring to. many civilization performed rituals so the gods would with their growing season but the most well known is that of the aztecs. they would make sacrifices, usually animals, but sometimes humans as well.