What was  primary  cause for the growth in global population?
a.
the slave trade
c.
new food crops
b.
new technology

c. New food crops

Explanation:

After the discovery of America, the Columbian Exchange began. This was a system of exchange of goods, people and ideas that took place between Europe and the New World. One of the advantages that such an exchange brought was the adoption of new food crops in Europe. Foods such as potatoes, tomatoes, chocolate, vanilla, sugar cane, maize, peppers, beans and peanuts arrived to Europe, and the adoption of these new crops led to an important growth in human population.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

the government paid religious orders to provide basic education to native american children on reservations. in the late 19th and early 20th centuries, the bureau of indian affairs (bia) founded additional boarding schools based on the assimilation model of the off-reservation carlisle indian industrial school.