What are some of the key terms of Marx’s theory of religion, and what do they mean? What are some of the examples Marx uses to illustrate and support his theories?

In Marx's own words:

'Religion is the sigh of the oppressed creature, the sentiment of a heartless world and the soul of soulless conditions. it is the opium of the people'.

Explanation:

Pls vote my answer as brainliest

what is the other part to the question

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.