She was not distracted by things and the demands they pose (to clean them, dust them e.t.c.) and so, she enjoyed the nature around her.
Both are similar to each other. However, foreshadowing hints at the possible outcomes in the future without any interruption in the story and using events or dialogues of characters in the present time. Flash-forward, on the other hand, is an interjected scene that takes the story forward in time. Flash-forwards are bound to happen in the story because it is showing you the future of the story, but foreshadowing is just hinting and predicting future events, so they may or may not happen.
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(B) The walk around Saxe-Coburg Square
is the key event in story which leads to Holmes' solution of the case.