How does the activity in this image represent specialization? a) the products being produced are specialized for each worker. b) this worker is completing one of many parts of a final product. c) this worker is making a product that is different from that of other workers. d) this worker is performing many different steps in the production of a product.

I don't have very much of an explanation other than I just took the test and this was the right answer.

can you explain it better

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.