[Video] Q18: No change or however, or therefore, or further,

Explanation for Question 18 From the Writing Section on the 2019 October Sat

Now a number 18 is a transition word question. 2 So we need to look before the transition and after the transition, 3 and then compare those sentences to see how they relate to one another. 4 And so before the transition, we're looking at this sentence here, 5 which says these blue light wavelengths are the same as those amended by artificial 6 sources of light, particularly computer screens, 7 televisions, and cell phones. And then afterwards it 8 says these devices affect our brains and our brains and bodies much like, 9 um, they lights effect. Right? 10 And so basically what we're doing here is we see that before at the 11 beginning of the first sentence is telling us about wave light. 12 Uh, blue light wavelengths are emitted from artificial 13 sources, and then they list these devices, right? 14 And then they go on to further describe that thesis. 15 These devices affect our brains and bodies. 16 And so basically there's a cause and effects a relationship here, 17 right? 18 The cause is that these devices emit blue light. 19 And the effect is that they, 20 um, affect our brains and bodies, 21 right? That blue light affects our brains and bodies. 22 And therefore is a transition word that shows cause and effect. 23 And so that is why C is our best answer. 24 Now, the reason that nevertheless a and however are not correct answers 25 is because to use nevertheless or however, 26 you kind of want to have a contrast between the two sentences, 27 right there kind of has to be ...