The correct answer is: C. SPRQ
The first sentence, S1, introduces the topic of the passage, which is the importance of using our ability to reason. The second sentence, P, provides evidence to support this claim by stating that humans are the only animals that have the ability to think and reason. The third sentence, Q, further supports this claim by stating that humans are able to plan what they are going to do in the light of their experience before they do it. The fourth sentence, R, provides an
example of how humans use their ability to reason, by stating that we should pause to think about the consequences of our actions before we take them. The fifth sentence, S, concludes the passage by restating the main point, which is that we must develop and use our ability to reason.The other options are incorrect because they do not follow the logical order of the sentences. For example, option A, QRSP, puts sentence Q before sentence P, which does not make sense because sentence P provides evidence to support sentence Q. Option B, SPQR, puts sentence P before sentence S, which also does not make sense because sentence S is a conclusion that follows from the evidence provided in sentences P and Q. Option D, QPSR, puts sentence Q before sentence R, which does not make sense because sentence R provides an example of how humans use their ability to reason, which is something that is not mentioned in sentence Q.