Can someone help as quick as possible, ty!

The pain of the beating was dull and distant, just as the things their eyes saw and their ears heard seemed dull and distant. . . . They were simply so many bags of bones in which sparks of life fluttered faintly.

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.