Giving harsher prison sentences and punishments is the best way to Reduce crime rate, because many developed countries are giving very hard punishments to those who break the laws. punishments is in the form of prison sentences, make people more conscious and they avoid to violate the rules.
On the other hand many people believe that some alternative methods need to be explored like high fines or challans. Consequently, it will also help to reduce crime rate in society.
In my opinion, harsher prison sentences and punishments are the best way to control criminal activities.