Concept:The sentence logically describes two major physical features that dominate America's physiography.
Explanation:Begin with the main subject: "America's physiography is" (Q).
Next, state the dominant feature: "dominated by the Andes Mountains" (S).
Then, specify the location of the Andes: "in the west and" (R).
Finally, complete the description with the second major feature: "the Amazon Basin in the central north" (P).
Other sequences, such as RSPQ or SPRQ, start with a subordinate clause and fail to introduce the subject clearly.
Therefore, the correct order is Q S R P.
Answer:Option C (QSRP).