What is the North Atlantic Drift? an ocean current that brings cool northern waters south
an ocean current that brings warm southern waters north
an air current that pushes cool air from south to north
an air current that pushes warm air from north to south

an ocean current that brings warm southern waters north

Explanation:

The north Atlantic Drift played a major role in warming up the European's temperature during their tropical season.

The current originated from Gulf of Mexico and move all the way to Greenland and Iceland. When the current reach there, it eventually cools and sinker to the sea floor.

The scientist predicted that this current has been around for more than half-million years. Without it, the average temperature that people in Europe and north America have during summer will be actually closer to the temperature in autumn or even winter.

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.