Answer:
I believe you are referring to the leaders from WWII. The leaders were Franklin Roosevelt (the United States), Winston Churchill (United Kingdom), and Joseph Stalin (the Soviet Union/USSR).
I hope this helps. ^__^'
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.
Conflict. It is no longer fun for her because she cannot beat him, which causes a conflict with her wanting to win
1. more para of the interior geography of North America were mapped.
2. The Americans "realized" that from the Atlantic ocean to the Pacif Ocean, there was no water passage.
