In general, where groups remain culturally or physically distinct, mobility between ethnic strata is:
a. enhanced.
b. limited.
c. neutral.
d. destroyed

b. limited.

Explanation:

Ethnicity refers to the social groups who share the same culture or nation. Social groups who remained culturally distinct develops stereotypes about the other groups belonging to different ethnicity. These stereotypes segregate the social groups on an ethnic basis and therefore the movement among different strata becomes limited.

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.