Thee florida driver handbook describes both legal and illegal uses of hazard lights. explain at least one legal use of hazard lights and one illegal use of hazard lights.

Legal use of hazard lights: if the car is in an accident or other wise disabled (unmoving) and located near a road (ie, the shoulder)

Illegal use of hazard lights: In heavy rain or any other time the vehicle is in actual motion.

Hazard lights are used to indicate and UNMOVING vehicle.

Legal Use of Hazard Lights: If the car is in an accident or not moving and you are pulled over near the road, you should use your hazard lights.

Illegal Use of Hazard Lights: When you use your hazard lights while your car is in motion, it is illegal to drive.

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.