Why was it important when Pope Leo III crowned Charlemagne emperor? It joined the Church and political power, which created a strong empire.
It gave a great deal of power to the Germanic knights and peasants.
Charlemagne was under the Pope's control from that time on.
It united the Eastern Orthodox Church and the Catholic Church.

It joined the Church and political power, which created a strong empire.

Explanation:

In the year 800, Charlemagne was crowned Holy Roman Emperor by Pope Leo III in recognition of his service to the Papacy including restoring the Pope to the Vatican after the revolt of some Roman Nobles.

The Pope saw this as an opportunity to be protected and for the Church to be powerful once more and so when he proclaimed Charlemagne as emperor, he essentially joined the church with political power which gave the empire a degree of legitimacy it did not have before and established it as a strong empire.

these conditions long with a short growing season made farming difficult.

explanation:

the north has a climate of warm summers and snowy cold winters. the terrain is rocky, hilly, and not good for farming.

b toward the volcano.landward. the landward side of something is the side nearest to the land or facing the land, rather than the sea.