Great work!! I hope you don’t have any trouble finding that answer
Answer:
darkness, an object, shadows... Many things can cover up someone's view. Also blindness. A blindfold can cover someone's view was well.
Explanation:
This is all as if we were talking literally. If we were talking, let's say, morally, we would say darkness, fear, despair, etc. :)
In my opinion, they do not only reveal what will happen, but also manipulate events. When Macbeth approached the witches, they could have concealed the truth from him and just let the events unfold, but they didn't do it. They told him about the prophecy, thus initiating the events that soon followed. If they hadn't told him the truth, Macbeth might have never killed Banquo, Duncan, and the rest in order to become king. So yes, they manipulated events and caused a great tragedy.
