in example (a), we come to feel 〚strong / strongly〛 that we are part of both nature and society. in example (b), we are led to imagine that, with on the sneaker, we will feel very 〚light / lightly〛, just like an angel.

답이 빨간색인데요, 왜 앞의 feel은 부사고 뒤의 feel은 light에요?