Read the excerpt from Walden. Simplicity, simplicity, simplicity! I say, let your affairs be as two or three, and not a hundred or a thousand;
instead of a million count half a dozen, and keep your accounts on your thumb-nail.
Which best describes the purpose of the "thumb-nail" imagery?
It illustrates Thoreau's belief that a person's responsibilities should include some manual labor,
O It illustrates Thoreau's belief that most people waste their time attending to their bodies' needs.
O It emphasizes Thoreau's belief that people should carefully choose their commitments,
O It emphasizes Thoreau's belief that people should carefully record their accounts,

It emphasizes Thoreau's belief that people should carefully choose their commitments.

Explanation:

'Walden' is a memoir of Henry David Thoreau. In his memoir, he records some of the fundamental elements that he experienced and considered vital for humanity.

In the given excerpt, Thoreau is talking about keeping life simple, by keeping simple commitments. He asserts that one should not overload oneself with commitments, whatever they may be, be it financial debts or social obligation. He asserts that these commitments should be less than a count on thumbnails.

Thus from the given options, the correct one is the third one (C).

the sentence that avoid faulty coordination is:

culture, which is well represented in philadelphia, plays a major role including theatre, music, and the visual arts.  

faulty coordination occurs when the writer gives equal importance two different ideas (clauses) which in fact are not equivalent. in order to correct a misplaced clause or idea, the writer can place less important or emphatic ideas in a relative clause as in the previous sentence.