I am trying to submit visitor visa for my Niece to come to UK during her School summer holidays. She will be coming alone and is 15 year old. I have couple of questions
1, since I am sponsoring her trip, I have entered my details, but under relationship column, I don't see any option to select uncle or other. what option should we select

2, when I enter my address for her accommodation, its again asking relationship to the private address but don't see any relevant option to select

I have got all the usual documents including bank statements, council tax bills, parents bank statements, passport copies. I am planning to add below other documents
1, Letter from school confirming in full time education
2, both the parents consent letter confirming their permission to travel and also use the funds from their FD's if needed
3, sponsor cover letter.
Please could you help with above 2 questions and if additional information looks good.
Thanks & Regards
Babulal