By criticizing the party that is in power, the party that is out of power serves a function.

Proactive critic point o view, which in many cases is called as watchdog or constructive critic.

Explanation:

Every time a political party is in power, it will have at least 1 opposition. Which serves as a critic point of view in all the party's in power calls, projects, ideas or actions. This is extremely important and in many cases serves as a point of better execution, because the party without power can analyze the party's in power calls and see its flaws. Thus, the party in power can improve its calls, projects and ideas to get a better impact in society benefiting with the help o the party without power the people o their country. It is a very clashing process but at the end of the day, both parties work together for the best of the people.

answer; /// i believe that the correct answer is( it left behind rich