In which type of irony does the audience know something that the character doesn’t know?

What is the central idea in this advice from branch rickey to jackie robinson?  

Asap read the bottom. use these 7 words to make 2 similies, 2 personification, 2 metaphors, and 1 of any so much backpack toaster drummer beach heart bicycle microwave examples: (if the examples were a quarterback, a wave, and stars) 1. the quarterback is a cheetah running down the field. (metaphor) 2. like a wave, the birds in autumn move through the air crashing into invisible shores. (simile) 3. the stars danced in the night sky. (personification) remember to write using complete, correctly capitalized sentences for each of the examples you provide. also, proofread and spell check carefully.

Based on structural elements what type of expository text does this excerpt from a 1917 congressional address by president woodrow wilson exemplify