Difference between individual identity and collective identity? please helpp

Collective identity refers to a person's sense of belonging to a group. The identity of the group, or the 'collective,' becomes a part of the person's individual identity.

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.

answer; /// charles darwin;