What is a jarls, Karl's and thralls in Viking history please write in a short sentences

and this is a second question if you can do it

Vikings became raiders because...

please write in PEEL graph ​

The history of the Vikings is something that draws millions of visitors to Norway every year in order to see things like the Viking Ship Museum. Although it is possible to see fictionalized accounts of Vikings in numerous TV shows and movies, a great opportunities to actually learn about the Vikings is to book a fjord tour in Norway and visit some of the historic sites they once ruled.

Explanation:

Jarls were the leaders, karls were just ordinary citizens and thralls were the slave class of citizens.

answer; ///i believe that the correct answer is (a) the great depression

due to inefficiency of management, the business plan has failed

idk what right product means but i assume it's this one since this was the last one left after i did the other three

the finance team has misjudged the requirement of business plan and chosen a wrong line of credit

operations risk is when the employees make a mistake

flash floods have damaged all machinery in the main manufacturing

natural disasters include anything ruined in the business by the weather or other disasters such as earthquakes

there have been foreign exchange rate fluctuations

economic risks is when things in the economy changes (like interest rates, currency value). the government has a large part in controlling this