The reasons:
 (i) Existence of political parties in a representative democracy ensures that the country runs as per its policies and ideologies and has a responsive and accountable government that is answerable to the people.
 (ii) Without political parties, candidates elected will be independent, will be accountable to their constituency for what they do in the locality.
 (iii) Political parties are required so that a country is governed as per set ideologies and will be responsible for how the country will be run.