Wat is order of importance in terms of nonfiction text structure?

When using the order of importance pattern,organization information can be structured from the least important to the most important or least important to most important.Both structures would be considered orders of the importance text texture

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hancock was president of congress when the declaration of independence was adopted and signed. he is primarily remembered by americans for his large, flamboyant signature on the declaration, so much so that "john hancock" became, in the united states, an informal synonym for signature.

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