Explanation for Question 25 From the Reading Section on the 2019 March Sat
Looking at number 25, the question asks us to determine 2 the main purpose of the second paragraph. 3 So we're going to go through our answer choices and try to find one 4 that we can see reflected in pretty much every single sentence of that second 5 paragraph kind of tying it all together. 6 So let's take a look at that second paragraph line 16 to 31 is 7 right here. Um, 8 so we can see that the discussion is about the artificial leaf, 9 which the author tells us serves as the fuel source in the bionic leaf. 10 Um, it explains how it works, 11 uh, and exactly how it mimics photosynthesis. 12 It tells us about the current from the solar way for, 13 and just generally how the artificial leaf works. 14 Um, and it also ties into how efficient it is and how this 15 is improving constantly. So generally this paragraph is meant to give us a 16 brief explanation of how the artificial leaf works 17 and how it serves as the fuel source and the bionic leaf. 18 So when you look at our answer choices, choice ISS to discuss the advantages 19 of a potential competitor, um, 20 this word competitor rules out this answer choice for us because the bionic and 21 artificial leaf kind of work together where the artificial leaf 22 is, as I just mentioned the fuel source for the bionic leaf. 23 So they're not competitors. A choice B says to explain the workings of a 24 central component, that is going to be our correct answer here. 25 Um, choice C says to describe the role of photosynthesis in the development of 26 the leaf. That's not something we really see discussed, 27 um, and C or excuse me, choice D talks about the efficiency. 28 That's something that's mentioned at the very end of the paragraph, 29 but we want our answer choice to be reflected throughout the entire paragraph. 30 So D is also out leaving us with choice fee.