As Scary100 says, you need to "research" This yourself.
The word "research" is key here.
I am not telling you how to answer the question (my view could well be wrong)
But I will explain below how I would plan and set out.
If I were doing this, I would be out in my local town centre now asking the local people what public reassurance means to them?
Do they feel reassured by their police force? If they do, why? If they don't, again note why?
Also try and speak to a diverse group of people as you may find people from different backgrounds or cultures may have very different opinions of police and their feelings towards police.
I would ensure I noted down the results of my research by noting the age, race, gender etc of the people I spoke to. This would ensure I got a full understand of different communities and I think this alone would give me a few minutes of talking time about the local communities views.
Then I would visit the local police station (if there still is one open) and ask if i could have a quick chat with the duty inspector or sergeant as part of my research and establish what public reassurance means to them. These folk are the first port of call to members of the public who are not satisfied with the police and wish to complain about the service. These will be made up of both victims of crime and possible suspects and offender's
I would ask them what is the root cause of somebody wishing to make a complaint?
In my personal experience, most complaints from the public relate to not being kept informed well enough of their case (this is often due to officer workload, not having time to go back to look at older jobs and contact victims regular enough) and incivility from police officers (perceived & actual)
If your research showed that indeed a lack of "being kept informed of their case" is a factor of complaints, that ultimately harms public reassurance, what will you do about it to help change things?
Also I would read the code of ethics as the introduction and description of Sir Robert Peel's policing model he founded in 1829 is still used today. If used correctly, it should give you some more ideas to things to put into your presentation.
Research the 9 principles of the code of ethics and decide if or how they could fit into the initial question your presentation is answering.
And finally, once I had all the research ready to note down, I would ensure it flows smoothly and you explain how I had conducted the research. This could ensure the panel are clear that you have put yourself out there and worked hard to gather the information.
Tbh it looks quite easy, but to somebody with no policing experience, it might be difficult to understand where to start.
Your "research" is key to putting this together, but I think once you have all the answers to your market research, you will struggle to stop writing and be looking at what to take out to get it into the time allocated.