Answer:
The answer is A.
Explanation:
Pull factors are something that makes you want to go to somewhere else, unlike push factors, which push you away from somewhere because something happened.
The New World crops that added the most calories to European diets and therefore positively impacted sustainable population numbers were "<span>b. Potatoes and maize," since these were the most abundant and had the most nutritional benefits. </span>
The most high tech city in Brazil is rio
