Answer: Freelancer is the correct option.
Explanation: Freelancer is the type of professional who is most likely to work for themselves and is not employed by a business or agency because he or she is an individual going to earn on a per-task basis and they generally work a very short period as they are not directly employed by a business firm or a company on a signed agreement. Thus, they enjoy the liberty to work on a various jobs for different clients from various fields of work.