Identify the word that should be corrected in the sentence: He ate for pieces of fried chicken at dinner, and no vegetables.

The word that should be corrected in the sentence is "for." The correct phrase should be "four pieces," as "four" refers to the number of pieces of fried chicken he ate. The use of "for" in this context is incorrect because it does not convey that he consumed a specific quantity; instead, "for" indicates purpose, which does not fit with the intended meaning of how many pieces he ate. Therefore, replacing "for" with "four" clarifies the sentence and accurately communicates that he had a specific number of fried chicken pieces at dinner.