Political Parties Contest Elections: Elections are FOUGHT mainly among the candidates put up by political parties.  Parties put forward different policies and programmes and the voters choose from them.Parties Make Laws: Parties play a DECISIVE ROLE in making laws for a country. Laws are debated and passed in the Legislature.Parties Form and Run Governments: The big policy DECISIONS are TAKEN by political executive that comes from political parties.Role of Opposition: Those parties that lose in the elections play the role of opposition to the parties in power by voicing different views and criticising government for its faliures.Parties Shape Public Opinions: They raise and highlight issues. Sometimes they launch movements for the resolution of problems faced by people. Easy Approach : Parties provide people access to government machinery and welfare schemes implemented by governments. For an ordinary citizen, it is very easy to approach a local party leader than a government officers.Please Mark Me as Brainlist