Wht are the definitions of these words. Communication systems

Import dependency

Opencast mine

Hinterland

Read the article titled "trans-saharan migration routes to north africa and the eu: historical roots and current trends." why do tens of thousands of sub-saharan africans try to cross the mediterranean each year? how are these refugees commonly portrayed? (site 1)

This diagram show the most important texts of.

Democratic vs democratic whats the difference? ?