As humans, we tend to focus on comments more strongly than comments. positive important
constructive constructive
important
negative
positive
negaitve

The first one is negative/unhelpful
the second one is important/helpful

The answer is:
unhelpful
positive.

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.