Explanation for Question 22 From the Reading Section on the 2019 October Sat
Question 22 says the primary purpose of the passage is to what? 2 So let's look back in the passage here at the title and introductory paragraph 3 and see if we can kind of identify what the primary purpose might be. 4 So the first thing that we can look at is the title. It says, 5 if not for plants, could rivers bend. So we can tell from that, 6 that this passage is going to be about the effect of plants on rivers 7 and their kind of form the path that they take, 8 right? Rivers bending, references, 9 the path that rivers flow. So plants affecting the way 10 the path rivers flow. And then we can look at those other two highlighted 11 pieces. It says for decades that Canadian geologist Martin gambling has been intrigued by 12 the Tufts of proof hypothesis. That land plants created the shape of modern rivers, 13 hundreds of millions of years ago. 14 And then that second piece says now gambling and postdoctoral scientists, 15 Neil Davies, both at Dalhousie university have strengthened this case. 16 So this case referring to the theory 17 hypothesis, whatnot outlined in that second paragraph there. 18 So basically we can see that this, 19 um, passage is going to be about how recent scientists 20 have solidified this idea about how modern rivers shaped 21 or how vegetation shaped modern rivers. 22 So let's look at the answer choices here and see which one best matches 23 that. If we look at answer choice, a, it says to evaluate the outcomes 24 of a study that appears to synthesiz...