Concept:The passage describes the logical sequence of an astronaut's training steps before going to space.
Explanation:Sentence 1 states that an astronaut must train.
Sentence Q comes first: the body must adapt to zero gravity.
Sentence S follows: they learn to wear the space suit.
Sentence P comes next: they use a simulator for practice.
Sentence R concludes the training: they learn emergency procedures.
This sequence flows naturally from physical adaptation to practical skills.
Answer:The correct order is QSPR, which corresponds to option B.