Final answer:
Comprehension failures can occur when understanding words, sentences, series of sentences, and the overall meaning of passages; being proactive in reading and understanding the rhetorical situation can enhance comprehension.
Step-by-step explanation:
Failure to comprehend a text can occur at multiple stages. It can happen a. when trying to understand individual words, which involves grappling with vocabulary and diction. It may also occur b. when trying to understand sentences, which is related to the syntax or the organization of words. Another stage is c. when trying to understand a series of sentences, which can involve recognizing the connection between sentences and their cumulative meaning. Lastly, it can happen d. when trying to understand the logical flow and meaning of the whole passage, which is about seeing the big picture and understanding the text as an integrated whole. Understanding the rhetorical situation, actively asking questions, and seeking credible information can help improve comprehension and lead to more critical analysis and evaluation of texts.