1)Does " the element she moved in" mean "the environment in which she walked/ran"?

1)Does " the element she moved in" mean "the environment in which she walked/ran"?
2) Does "Rather they became a part of it" mean "of course they became a part of it (the world)"?
3) Does " class definitely" mean "categorize absolutely"?

Context:

On these lonely hills and dales her quiescent glide was of a piece with the element she moved in. Her flexuous and stealthy figure became an integral part of the scene. At times her whimsical fancy would intensify natural processes around her till they seemed a part of her own story. Rather they became a part of it； for the world is only a psychological phenomenon， and what they seemed they were. The midnight airs and gusts， moaning amongst the tightly-wrapped buds and bark of the winter twigs， were formulae of bitter reproach. A wet day was the expression of irremediable grief at her weakness in the mind of some vague ethical being whom she could not class definitely as the God of her childhood， and could not comprehend as any other.