Write a diary entry about your brother birthday party

Dear diary, my brother's birthday was it was so cool seeing all of his and my so happy!

Explanation:

(then just go on telling them how your brother's birthday party went)

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 correct answer is fluency