What type of trade especially helped Constantinople grow wealthy even as the Western Roman empire crumbled?

increasing defense spending.

explanation:

cultural/diplomatic relations. most medieval japanese   culture has chinese origins. writing, architecture etc.

the noble might have thought that the system was far because they had lot of things and riches and the serf would have thought that the feudal system was un fair because of the way they were treated.

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.