Which topic is revealed through imagery created in the bolder words?

The question: Which topic is revealed through the imagery created in the bolded words?

The

self expression

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roosevelt, a progressive reformer, earned a reputation as a "trust buster" through his regulatory reforms and anti-trust prosecutions. his "square deal" included regulation of railroad rates and pure foods and drugs; he saw it as a fair deal for both the average citizen and the businessmen.