The emotions which are most easily recognized from facial expressions include happiness, anger, and

Disgust

Explanation:

These are the emotions that are most easily recognized from facial expressions. Humans tend to express their emotions in their facial expressions, and this allows us to communicate our feelings to other humans. Moreover, the feelings of happiness, anger and disgust tend to be universal, as well as the facial expressions that accompany them.

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.