Why I am interested in becoming a fire fighter - 500 words

Num. of words: 500
Topic: Reason why I wantto become a firefighter.
Tone: Formal/Professional
Outline & Structure: I require 500 words to be written about the following:

Please state why you are interested in becoming a Fire Fighter with West Midlands Fire Service?
You are to limit your answer to 500 words no more.

I have attached the areas in which I need the 500 words related too. The information is there just needs to be written as a paragraph of 500 words.

Extensive research needed: no
Extra notes: I require it to be professional and appealing.