Question

Identify the type of error in the sentence. If the sentence contains no error, select C. The children asked about the electric train and how to use it. dangling modifier misplaced modifier lack of parallel structure incorrect adverb clause placement C

Answer 1

parallel structure is the type of error that exist in this sentence.
The words in that sentence the same pattern of words to show more than one words or ideas that  are of equal importance and to help the reader comprehend the stuffs that being written, usually marked by the use of coordinating conjunctions such as "and" or "or."

Answer 2

 if the sentence is just "The children asked about the electric train and how to use it"  then there is no error