The passage that uses the appropriate style, tone and voice for a literary essay is:
4. Simon had profound knowledge to share with his friends, but was a a loss for words.
This passage uses adequate vocabulary for a literary essay. A literary essay is characterized by having an elegant and serious tone. At the same time, it has a formal style, which is common in academic writing. Statement number one uses informal language by using words like "geek" and "a lot." Statement number two, "OMG" is an informal expression that is used in casual conversations and does not reflect a formal tone. Finally, statement number three uses an informal expression which is "very great."