Answering the why you job interview question?
Hopefully you have gone to an interview prepared for almost any question. If an employer asks why you? Simply tell them that you think you are very qualified to do this job and give them the reasons you are qualified to do this job.
You can answer this interview question by tailoring your answer to the job you are applying for. Pick out aspects of the job and use this in your answer. You could say interacting with customers, data entry or answering the phone. It just depends on what job you are applying for and what you will be doing.
You should expect to be asked this question during a job interview. It is best to be prepared by having researched the company and the position. Being knowledgeable about both will give you an advantage when answering this question. You can give concrete reasons as to why this particular company appeals to you.