What type of city usually have large immigrant populations?
a) primate cities
b) gateway cities
c) emerging cities
d) threshold cities

What type of city usually have large immigrant populations? Gateway cities

Explanation:

To understand the answer we have to know the concept of the correct answer and why they contribute so much to the country's economy.

Gateway cities are the cities in which immigrant concentration ins higher due to two factors. First of all, they have more access to opportunities than the rest of them. They in the majority are industrial cities o cities with very big access to opportunity by its population. The second is that they are surrounded by small cities or towns. So, immigrants can relocate to those zones and work in the gateway cities. They have a niche industry and permit the financial growth of their people.

The answer is "poor nations, where women have fewer economic opportunities".

Poverty or neediness is the essential main factor behind ladies getting to be prostitutes. Prostitution is a constraint of ladies and kids, and uses the defenselessness of neediness to additionally misuse them. 
All through the world there are constrained and to a great degree rare open doors for ladies who are uneducated and ruined. As per the Social Weather Station, factually this is a similar populace with the most astounding rate of kids that makes extra economic pressure. There is no necessity for being a sex worker. It requires no training, no references and no experience.