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The answer is semiconductor. It is <span>a solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits.</span>
Answer: 2- The poet repeats the word “perched” to show that the raven is threatening to the speaker, and this contributes to the mood of powerlessness in the poem.
Explanation: repetition is a literary device that consists in repeating certain words or phrases in a sentence or paragraph, in order to create an impact in the reader. In the given excerpt from "The Raven" we can see an example of the repetition of the word "perched" this shows that the raven is threatening to the speaker (it is always watching the speaker) and this contributes to the mood of powerlessness in the poem (because the speaker doesn't seem to be able to do something to stop the raven from watching him).
We can actually see here that the author primarily structure "Collecting Rocks" in the following way: B. Reported from teachers around the world.
<h3>What is structure?</h3>
Structure refers to the organisation and arrangement of a particular thing. Text or passages can be structured in such a way that one can understand what is being passed across.
Thus, we can see here that the author primarily structures "Collecting Rocks" by the reporting from teachers around the world.
Learn more about structure on brainly.com/question/12053427
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