"the concept of object permanence is first understood in the stage of cognitive development"

Answersensorimotor

Ghana, first of the great medieval trading empires of western africa (fl. 7th–13th century). it was situated between the sahara and the headwaters of the sénégal and niger rivers, in an area that now comprises southeastern mauritania and part of mali.

D, because civic virtue is basically doing what’s morally good.