The young woman pressed and prodded the wasted muscles, resting her body on her knees, her bowed head hidden as in a cloud by her black wealth of hair. negore watched the supple body, bending at the hips as a lynx's body might bend, pilant as a young willow stslk, and withal, strong as only youth is strong. which sentence best explains the central idea of this section of the story?

I feel it's the first sentence, "The young woman pressed and prodded the waster muscles, resting her body on her knees, her bowed head hidden as i na cloud by her black wealth of hair." 

Sentence 2 talks about how "Negore" watched her as she did that, so ultimately this section revolves around Sentence 1. 

I might be wrong, I mean there's a fifty-fifty chance as there's only two sentences. But, hope I could help! (=^_^=)

That's something your gonna have to yourself with buddy!