<span>The main cause of the Islamic world's hardships during the thirteenth century was:
</span>B. Mongol tribes invading Muslim lands
Well, one cause they had is coal. they used that for railroads and factories. but coal caused a lot of damage to the environment at that time. hopefully this is correct. good luck.
The style, known for its <em>elaborate bric-a-brac, excessive gingerbread, trim work, and other ornamentation</em> between the 1830s and early 1900s, is the <em>Victorian gingerbread-style</em>.
The Victorian styles used gingerbread architectural styles, consisting of elaborately detailed embellishments with exterior decorations that are sawn or carved.
Thus, the building structures of the 1830s and early 1900s used the Victorian gingerbread-style, with its elaborate bric-a-brac, excessive gingerbread trims and other ornamentations.
Learn more about the Victorian gingerbread-style here: brainly.com/question/6668517
For 6 it should be A or D
I think the answer is either C. or B. take your pick I am leaning more towards C. though I hope this helps :)
