Chronic drought and food insecurity plague Sahel, which is already one of the poorest in the world moreover the climate and geography of the region _______ regional communities to relative isolation. a) Alleviates b) Relegates c) Downgrades d) Transgresses

The sentence talks about ?drought and food security? which has pestered the region and in addition to that the climate and geography has worsened the matter and forced them to come to isolation. ?Relegate and downgrade? are the two words which means to move down to a lower position arethe most suitable word to be filled in the blank. ?alleviates? which means to make less severe, will not complete the sentence sensibly. ?Transgress? which means ?to misbehave or to break the law? which does not fit in the context whatsoever.