The process responsible for destroying shorelines along seawalls in urban areas is erosion, which is the natural wearing away of land by wave action and currents. Other options like deposition, eutrophication, and groundwater infiltration do not directly cause shoreline destruction. Thus, erosion is the most relevant factor in this context. ;
The process that destroys shorelines near seawalls in urban areas is erosion. This occurs as waves wear away the land, often exacerbated by the presence of seawalls. Therefore, the best answer to the question is option A: Erosion.
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