[Video] Q19: No change or to preserve them or preserving them or they are preserved

Explanation for Question 19 From the Writing Section on the 2017 April Sat

Question number 19, let's take a look at this sentence. 2 Recent studies suggest that beaver dams not only create diversely populated ecosystems, 3 but also preserve them during times of environmental stress. 4 So not only create, but also what during times 5 of environmental stress. Um, 6 so taking a look at our answer choices, we want to make sure that, 7 um, our two verbs here we have create and preserve. 8 We want to make sure that they're in parallel. In other words, 9 that they're presented to us in the same form. 10 So we kind of need to just take a look at what's done earlier 11 in the sentence and then follow that same format, 12 that same tense with our second verb in this case we have create. 13 So, um, we have that plural present tense going on. 14 So what we wanted to do here is also have that plural present tense 15 in this case preserve is that word. 16 So we're going to stick with preserve, um, 17 and select the no change option for this question. 18 Um, these other answer choices wouldn't really make sense. 19 They break the pattern that's established by create diversity populated ecosystems. 20 We wouldn't want to say not only create, 21 but also to preserve them or not only create, 22 but also preserving them or not only create, 23 but also they are preserved. It really makes sense. 24 Stick with the same for perform. We call that parallel structure and it generally 25 just makes the passage flow better and makes it easier for the reader to 26 understand. So choice a here is the best.