What do these all have in common. Accept / Except.
Affect / Effect.
A Lot / Alot.
Allusion / Illusion.
All Ready / Already.
Altogether / All Together.
Apart / A Part.
Ascent / Assent.

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.

answer: "the beating heart symbolizes the narrator's conscience, or his sense of guilt and wrongdoing" so its b

explanation:

"to look at him, or hear him describe it, he had no guilt. however, poe decided to symbolize this man's subconscious guilt through the heartbeat."

we need to see the paragraphs in order to answer this.

where is the article\