Practice question

Answer: B) Critical limit. For Excretory System, once you lock onto the key mechanism or definition, Critical limit is the clear fit. If you restate the concept in your own words, Critical limit is the option that correctly names the structure, process, or principle asked for in Excretory System. So Critical limit is the clean, accurate selection. If a similar stem appears later, start from the same core fact and you will land on the same kind of answer. In class notes, highlight this same phrase next to the related diagram so the wording and the picture reinforce each other.