Concept:This is a sentence arrangement question that tests logical continuity between a fixed opening and a fixed closing sentence.
Explanation:S1 states that the shift to agriculture was a highly profound change in human history.
S describes life before that shift, when almost all humans were hunters and gatherers living in close harmony with nature.
Q continues this idea by explaining that those humans lived like their hominid predecessors as integral parts of the Earth's ecosystems.
Thus, S follows S1, and Q naturally follows S.
R begins with “However,” which signals a contrast, and introduces the new agricultural practices that made farmers and herders manipulate nature to an unprecedented degree.
P then tells us exactly how they did this: by transforming landscapes into agricultural fields and pastures.
This manipulation directly sets up S6, which mentions the disruption of natural balances.
Therefore, the correct arrangement is S, Q, R, P.
Answer:The correct sequence is SQRP, which matches option D.