In industrialized countries such as the us and canada, social inequality exists, but opportunities for obtaining education and professional training mean that people can attain a higher socioeconomic class than their parents. this form of social inequality with possibilities for social mobility is referred to as:

Open Class System

Explanation:

Open Class System is the opposite of the Closed Stratification System. On the Open Class System, people can have social mobility achievement-based. The Closed Stratification System is the opposite. A person is born into a class and is closed into it.

The Open Class System is present in most industrialized countries and the Closed Stratification System is present in less industrialized countries. 

9) a & b

10) true.

11) false.

12) false.

13) true.

14) false.

15) true.

16) true.

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answer; environmental science;