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.
<h3>Steps to writing the letter:</h3>
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:
Answer:1) He makes the dinner. 2) Charlie writes the letter. 3) The teacher reads my story. 4) We send the wedding invitations. 5) Sally cleanes the car.