I believe the answer is: positive externality
Positive externality refers to The benefit that enjoyed by a third party when the first and second party are conducting a transaction.
When you receive a vaccines, you prevent yourself from becoming a host that could contaminate other people from getting the virus. In the example above, you and your children are the first and second party. And other children are the third party.
South Americans is the answer I believe
Answer:
Colonial rule provided an environment in which Christianity, in many forms, spread in many parts of Africa. While Islam was widespread in Africa prior to the coming of colonialism, it also benefited from colonialism.
Explanation:
Ulysses S. Grant was the president during the end.
