If samantha is drinking coffee because she likes how it makes her feel, her motivation would best be described as:

She might be motivated by the taste of coffee, or she may be motivated by the caffeine which would make her feel more energetic and lively.

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.