Arrange in logical order: P) Water is essential for life. Q) Humans use water daily. R) Without it survival is impossible. S) Therefore water should be conserved.

The correct logical order is P-Q-R-S. This sequence establishes a clear and coherent argument, moving from a general statement to specific examples, then to a critical consequence, and finally to a logical conclusion or call to action.

• P) Water is essential for life. This is the foundational statement, introducing the primary importance of water. It sets the stage for the entire argument.
• Q) Humans use water daily. This statement provides a specific example of how water's essential nature manifests in everyday life, connecting the general truth to human experience. It elaborates on the 'essential for life' aspect by showing its practical application.
• R) Without it survival is impossible. This sentence reinforces the critical importance of water by stating the dire consequence of its absence. It acts as a strong justification for the need to value water, building upon the previous points.
• S) Therefore water should be conserved. This is the logical conclusion drawn from the preceding statements. Given that water is essential, used daily, and indispensable for survival, the natural and necessary action is to conserve it. The word "Therefore" explicitly signals this conclusion.

Any other arrangement would disrupt this natural flow of reasoning, making the argument less clear or illogical.