the author's purpose and what genre it is
It was powerful in war and in magic,and its priests and medicine men were feared in all the surrounding country.
With imagery it has to create like a visual image in your head if that makes any sense
so i would say b) because it's the only one that is like that, the other ones are just boring descirption of what the people are doing
I think it is Madame Forestier... I hope I helped.