Concept:Arrange the given sentences into a coherent paragraph between S1 and S6 using logical cause-effect flow.
Explanation:S1 states that staircase falls differ across countries.
S gives a concrete example: in Japan, such falls are more common in offices, stores, and stations than in the United States.
Q explains this: Americans rarely use stairs in public places, not because the Japanese are reckless.
P adds the reason: Americans depend on lifts and escalators available in those public places.
R draws the conclusion: staircase injuries in America mostly occur at home.
S6 confirms this by saying that for Americans, home is the only place where they regularly use stairs.
Hence the correct order is S, Q, P, R.
Answer:SQPR (Option D).