Pre owned sounds like it is in better condition compared to used
What paragraph above?
It usually means confusing, but if I knew the context I might be able to help you better.
Answer:
The author feels Diane is skillful and careful in her work with the tiger.
Explanation:
Taking a position in an argument means taking a side. When taking a side in an argument, the author will most likely give you biased evidence. They will only give you reason to believe their side, without giving you any sort of evidence for the other side in the argument.
I hope this helps!