A subject complement is either a adjective, a noun, or a pronoun that follows a linking verb.
The main idea is basically that anyone, no matter what they're believed to have done, deserves to be considered by a non-biased group of citizens.
<u>Answer:</u>
<em>A crow knocked some snow down onto the speaker </em>
<em>This is the event that causes the speaker to reflect in the “Dust of Snow.”</em>
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<u>Explanation:</u>
Robert Frost’s poem “Dust of Snow,” is about being optimistic. The poet was sitting under a Hemlock tree when a crow knocked down some snow particles on him. This simple incident struck a different chord of the poet’s mind and changed his view about life completely. So he thinks it is ironic that a crow not related to goodness did a good deed and evoked the sense of finding positive in negative situations. This small event led to the shift of the poet’s mood from hopelessness to hope.