Who wrote the source that we have available about the vikings
the celts
the anglo saxons or
the anglo saxons clergy

The source we have available about vikings comes from the Celts.

Explanation:

Celts are the settlers from Scandinavia who scattered all over the Western Europe and islands beyond it and settled those lands.

The Vikings were their neighbors in many of their settlements and there were few Celtic cultures like the ones in Denmark that were close to them and had some genetic intermingling.

This resulted in the documentation of the viking ways by the Celts from whom it has been passed down to us.

These documents include sagas like the Viking Saga and history of their kings.

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.