In a formal outline what should roman numerals represent?

Main Ideas.

Explanation:

Outlining in an essay displays the map of an essay. It reflects the central idea of each paragraph and arranges information in order to convey an effective message to the readers. It is crucial to organize an idea, visualize the structure of the thesis and develop the main points in a logical order.  

The formal outline employs the Roman numeral to represent the main ideas. This type of outline usually begins with a roman numeral that differentiates it from an informal outline. Thus, the last option best exemplifies the appropriate function of roman numerals, i.e. to display the main points that develop the thesis statement.

beneatha's hair symbolizes wealth  

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when making an inference, the reader should be sure to support the inference with

evidence

a is an educated guess about what will happen.

c. prediction

when new information proves that a reader's prediction is wrong, the reader should

make a new prediction based on the new information.