Final answer:
The imagery of the tide in O. Henry's "The Cactus" symbolizes the unraveling of love for Trysdale, representing a loss of control and uncertainty in the relationship.
Step-by-step explanation:
The imagery of the tide in O. Henry's "The Cactus" is telling about the unraveling of love for Trysdale because it represents a shift in the control and direction of the relationship. The line "For the thousandth time he remarshalled in his mind the events of those last few days before the tide had so suddenly turned" suggests that Trysdale is reflecting on the events leading up to the change in his love life. This imagery illustrates the loss of control and uncertainty that comes when the tide turns, mirroring Trysdale's experience of losing control over the love he once shared with someone.
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