Your question is Why UX/UI Design. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Why do you want to go into UI/UX design? Explain what attracted you to the field, how your past experiences shaped that interest, and why this role is the right next step. Use a specific example rather than describing UI/UX only in general terms.