How do you answer 'In full sentences describe why you think you qualify for this job' on a job application?

I understand that I qualify because of of my vast knowledge and education in the area of the field (explain your credentials but don't BOAST). I also have the experience which has developed my skills (explain your credentials here).Ultimately, because of my leadership in (explain leadership positions you've had or opportunities). That's why I believe I'm qualified because this job needs someone who has a strong background and a geniune interest in the field.
Your Job Limited is the business based in Macclesfield