Question

explain the function of the police in our country

Answer 1

Police is the one who secure the people's and that place's security

Answer 2

Police officers play a central role in the law enforcement system. They monitor criminal activity, take part in community patrols, respond to emergency calls, issue tickets, make arrests, investigate crimes and testify in court as needed.
A police officer's first order of business is to serve and protect. In fact, the phrase "serve and protect" is common in the credo of many law enforcement agencies. Police officers serve their communities by helping citizens in times of crisis and emergency, such as when a natural disaster hits. To protect citizens on the road, they issue tickets to dangerous and careless drivers. To protect them in their communities, they make arrests that deter illegal and dangerous behavior.
When someone calls the police department after a crime is committed, officers in the area respond to the call. They take statements from parties involved in the incident as well as any witnesses to get additional information and statements. Officers also gather up any evidence immediately accessible and help section off areas where the crime occurred so forensic scientists can come and do more thorough evidence searches.