This might not be detailed enough but she can have a healthy diet and workout to keep her skinny and fit while also being healthy. I hope this helps but u might have to add more detail to your answer than what i put.
1: taphonomy
2: remains
3: organism
4: feathers
5: fossilization
6:buried
7:decay
8:minerals
9:pressure
10:solid
11: formed
12: sediment
13: dissolves
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Sorry if any of these are wrong. But I think they make the most sense. Hope this helped you out a bit. Please comment if I got any incorrect thx.