Nature is so ingrained in her, it is an inherent part of her, so much that instincts are those which lead her life and make decisions for her.
Explanation:
Sylvia is a girl stuck between two worlds. On one hand, she's a girl born in the city but on the other, she never felt actually alive till she left out to the county with her grandmother. “Whatever reserves were lost to her, woodlands and summer-time, master! Bring your gifts and blessings and tell your puzzles to this desolate country child and she was deeply impressed by nature.
Your answer would be D) The gentle foothills ended quickly, and the runners made a steep scramble to the top of a cliff, followed by a daylong run up across uneven terrain of hard, coarse-grained rock.
And, just so you know.... I never guess when providing answers. If I don't know the correct answer, I don't answer. It's as simple as that. So, what I'm saying is that I am 1000% sure of my response.