It is hypothesized that people who possess variants of certain genes may be more susceptible to developing depression if they have a history of severely stressful life experiences, such as maltreatment during childhood. This idea is consistent with the model.

diathesis-stress model

Explanation:

It is hypothesized that people who possess variants of certain genes may be more susceptible to developing depression if they have a history of severely stressful life experiences, such as maltreatment during childhood. This idea is consistent with the diathesis-stress model.

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.