The answer is tourist dollars
The answer is - c. serving in the military.
Just to be clear, serving in the military is not forbidden for Israeli Arabs, but it is the only thing that is not ''required'' of them to do. Israelies have to go to military service, while Israeli Arabs are not ''required'' to do that. Even though most of them don't do it, still there's the occasional exception where some of them want to go to military service and they do attend it.
Answer:
Wastewater treatment
Explanation:
The major aim of wastewater treatment is to remove as much of the suspended solids as possible before the remaining water, called effluent, is discharged back to the environment. As solid material decays, it uses up oxygen, which is needed by the plants and animals living in the water.
Http://history-world.org/islam.htm
This site will provide information, but it changed the entire social order and beliefs, customs and culture of the people.
