[Video] Q44: No change or techniques for fighting fires, in space or at future outposts or techniques for fighting fires in space or at future outposts or techniques for fighting fires in space, or at future outposts,

Explanation for Question 44 From the Writing Section on the Official Sat Practice Test 8

So question 44 is a punctuation question. 2 And if we look at our sense, it says better combustion rate models may 3 even lead to the production of more fuel efficient engines and improved techniques 4 for fighting fires and faith in space or at future outposts on moon, 5 on the moon and Mars. And so what we've done here is we've put 6 a comma between techniques and for, 7 right. And so perhaps this might seem right, 8 because we have comma four, which is a comma and then a coordinating conjunction, 9 right? But if we look more closely, 10 we know that we only use this a comma and then a coordinating conjunction 11 when we're separating two independent clauses. 12 And now the second half of the sentence fighting fires and space or a 13 future outposts on the moon. And Mars is not an independent clause because we 14 have no subjects. We don't know who is fighting the fires. 15 So as it's written a is wrong because this light blue part is actually 16 a dependent clause, not an independent clause. 17 Now CSS techniques for fighting fires, 18 comma in space, or at future outposts. 19 We see here that in space or future outposts on the moon and Mars 20 in is a preposition, right? 21 It describes a relationship, a physical like relationship 22 between where something is such. 23 So other examples would be like into, 24 for tween. Those would all be prepositions. 25 And we don't want to put a comma in front of a preposition because 26 then that removes it from what the relationship ...