Identify the error in the sentence: "He ate for pieces of fried chicken at dinner, and no vegetables."

The phrase "for pieces of fried chicken" contains an inappropriate preposition. In this context, the intended meaning is that he ate a certain number of pieces of fried chicken, which requires the preposition "four" instead of "for." The word "four" accurately quantifies the pieces of fried chicken consumed. Using "for" creates confusion, as it suggests a purpose rather than a quantity. This grammatical choice is crucial to convey the intended message clearly and accurately.