Answer:
I can't answer the second question because I do not know the choices, but I can answer the first part.
The purpose of using hyperbole in this sentence is to create a vivid and exaggerated image of Pecos Bill’s skills and fearlessness. It is a way to add humor, entertainment, and emphasis to the description of the character. The hyperbole also helps to make the character more memorable and larger than life, which is fitting for a legendary figure like Pecos Bill in Western folklore.
Hope I could help.