What forms when one oceanic plate is forced beneath another plate?

In what ways has the human population put pressure on the land

What is the approximate circumference of the circle shown below? 12.2 cm

Canada plays an important role in the global community in all of the following ways except by a. acting as a superpower with influence over europe and asia. b. promoting arms control and disarmament. c. working with the commonwealth of nations to promote trade. d. promoting trade with japan and other asian countries.