What is an autobiography??
give an example!! ​

An 'autobiography' is a retelling of someone's life that was written by that person. You could write an autobiography of your own life. If you write the story of another person's life, it's called a 'biography. For example - David Copperfield (1850) by Charles Dickens and Salinger's The Catcher in the Rye (1951).

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.