"I think that they are fine."
Translation:Dw i'n meddwl bod nhw'n braf.
This phrase is a zombie, so we cannot edit it.
It was probably deleted from the course because braf is not used to describe a person as 'fine', as it is with the weather. If a person is braf it means that they have a strong, muscular physique - a 'strapping' person, in British English usage.
iawn would be better.