Anyone know this one ???

Identify the type of chemical reaction involved in each action.

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.

How does central place theory explain patterns in the size and distribution of cities?