Explanation for Question 24 From the Reading Section on the 2019 October Sat
Question 24 asks which twice provides the best evidence for the idea that plants 2 can affect the lateral pattern of flowing water. 3 So basically this is just kind of a fancy way of asking which choice 4 provides the best evidence for the idea that plants can change the shape 5 of rivers. Right? Lateral pattern here would correspond to shape and then 6 flowing water would correspond to the river. 7 So which one proves that plants can change the shape of rivers? 8 So let's start here with answer choice a it says when the pair compared 9 a much improved plant fossil record with evidence of how rivers changed very long 10 ago, the transitions matched up. So answer choice a mentioned changing 11 rivers in general, it's not talking directly about how 12 plants impact rivers in their shape, 13 and it's not talking directly about the shape of rivers changing. 14 It's just talking about the change of rivers in general. 15 So answer choice a is a little bit too broad. 16 So it would be incorrect. If we look at answer choice B, 17 it says there's probably nowhere on earth where rivers form the way they did 18 before vegetation answer choice. B gives us a little bit more of a connection 19 between the rivers and the vegetation. 20 But again, it only gives us a general sense of how the rivers changed 21 rather than that specific thing about shape. 22 So answer choice B would be incorrect if be looking at an answer to, 23 I see it says before plants evolved. It didn't matter if a river w...