Question

why is it necessary to have elections at regular intervals in a country

Answer 1

Hello buddy..
Elections are one of the most necessary factor for democracy. There is a necessity to held elections at regular intervals coz..
1. It helps us to keep a check on our leader in regular intervals. 
2. It helps us to choose the most appropriate candidate for making decisions. 
3. It is not physically possible for the whole population to sit together and make decisions. 
4. Even if everyone sit together, they may not have required skill and knowledge to take the decisions. 
5. Time is also required to take such decisions.
Elections in India are considered to be the very backbone of the Indian democracy. Being a Parliamentary Republic, the citizens of India are trusted with the responsibility to choose the head of the country as well as of the state.

Hope it helps you buddy..

Answer 2

It's necessary to have elections at regular intervals so that:-
*People get a chance to review their choices 
*Those who are in power can't exercise absolute control. 
*People remain the ultimate decision takers in a democracy. 
*Those who are in power are forced to fulfil the needs and demands of the public.