I believe the answer is the 3rd option. My apologies if I’m incorrect. :)
Jamestown was situated on a site that was too secluded for agriculture, in fact, the entire island was isolated because it was swamp-like and infested with mosquitoes and the only water came from tidal rivers. This water was unsafe to drink, which could cause health problems such as cholera, typhoid or dysentery. I give credit to @Barnuts
But i agree with this but hope this helps.
Answer
Pull factor in migration
Explanation
A pull factor best describes things that attracts people to a country, a religion ,an organization, a region e.t.c Native Americans who were the people who discovered and lived in the America very many years ago. They were promised new lands in the west where they would be protected from land-hungry homesteaders which in migration is considered as a pull factor in migration .Migration is a global phenomenon which is caused by economic and social political, cultural, environmental, health, education and transportation factors. Pull factors in migration are the positive aspects that attract immigrants .They include better education and job prospects,political stability and religious freedom.
Answer:
The European Union (EU)
The EU is the world's largest trading bloc, and second largest economy, after the USA. ... The five largest Economies, Germany, France, the United Kingdom, Italy and Spain, account for around 70% of the 28-country trading bloc.
Explanation:
Computers have made making maps easier, because of digital technology. It's easier to pull a program to make a map.
