According to the critical period hypothesis, children will never learn to use language normally unless they are exposed to language by

According to the critical period hypothesis, children will never learn to use language normally unless they are exposed to language by being exposed to other people, who are using language-spoken or signed. language acquisition becomes more difficult when children become older.

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.