Which of the following statements about race is false? a. race is based on physical characteristics. b. race is socially constructed. c. race has a biological basis. d. race is often used to compare people.

answer; i believe the correct answer is prefrontal cortex;

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.