How to enhance my vocabular level ?

One of the most common and effective ways is to read as many books as you can, and to keep a vocabulary journal.

Whenever you come across a word you don't know the meaning of, don't just look up the definition in a dictionary; write down the meaning of the word in your vocabulary journal, as well as a use in a sentence for the word. Doing this forces your brain to remember the definition of the word at a level deeper than if you had only looked up the word's meaning.

Hope this helps!

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.

the turtle carries new life, oat seeds, over to the other side of the highway and plants them there.