Through hard work, Gan lives comfortably without much financial debt. Now he wants to improve relations with colleagues and form stronger friendships. Which needs-based theory of motivation best explains Gan's recent focus on his social needs?

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.