Answer:
it depends on how the time format is given to you
C , an adverb describes the verb . The verb is impressive . What is in impressive ? C the model bridge is impressive . Therefore C is the adverb .
The central idea of paragraph 6 is different things that can get use for insulation.
<h3>What is topic sentence?</h3>
Topic sentence refer to the central idea or main. idea of a paragraph, passage or an article which summarizes what the paragraph is all about.
Therefore, The central idea of paragraph 6 is different things that can get use for insulation.
Although the question is incomplete as the options were not given, but it can be deduced from the paragraph what the central idea is.
Learn more about topic sentence below.
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