Answer: a needle exchange program is an example of HARM REDUCTION POLICY.
Explanation: Needle exchange program, is a program that helps to minimize risk and harm among drug users, by distributing sterilized needles and syringes to them without demanding any cost, and properly dispose the used ones. This program does not promote illegal drugs or drug abuse, as the program is not to promote crime and injustice. It is clear that this program is meant to reduce harm in the usage of injections among citizens.
Harm Reduction policy, are those policy that helps to reduce poor health, or any illegal practice in drug usage or drug law.