The above question wants to analyze your writing and arguing ability. In that case, I won't write your letter, but I will show you how to write it.
First, you should know that this letter has a professional nature and for that reason, it should be written in a formal language, without slang or colloquial expressions. In addition, the letter must be direct and objective, composing a short and straight-to-the-point text.
Steps to writing the letter:
- Introduce a greeting that could be "Dear Mr./Mrs." or "To whom it may concern."
- Introduce who you are and why you are writing this letter.
- Show the importance of photos and what they represent historically.
- Show how important it is for the population to see these photos and understand.
- Finish by saying goodbye cordially.
More information on how to write a letter at the link:
https://brainly.com/question/24623157