💡 Quick Summary

Great question to dig into - this is all about understanding how the same word can play completely different grammatical roles depending on how it's used in a sentence! The key here is thinking about the core difference between what adjectives do versus what pronouns do in general - one modifies a noun, while the other actually replaces or stands in for a noun. So here's a question worth sitting with: when you look at the word "which" in your sentence, is it sitting directly next to a noun and describing it, or is it out there on its own doing a noun's job? Try picturing a simpler version of the sentence where "which" is clearly glued to a noun right beside it, then compare that to what you actually see here. What role does "which" seem to be playing in the sentence's structure - is it the subject, or is it tagging along with another word? Trust your instincts on this one, because once you identify what job "which" is performing, the label tends to click right into place!