Why does the population of foreigners outnumber citizens in some countries on the arabian peninsula? because their social services are attractive to immigrants because they have the world’s lowest income taxes because workers are needed for development projects because of palestinian refugees from israel

The correct answer is - because workers are needed for development projects.

The countries in the Arabian peninsula has developed significantly in the last decades and are continuing that trend, so for the fast, modern, development they need a lot of workers which they do not have, so they offer jobs to foreigners.

This country likely has a high total fertility rate (tfr).