Final Answer:
The detail that is most important to include in a summary of the article B) "Many predators that have been quietly waiting in the background all day become more active at dusk and dawn." (lines 28 and 29)
Step-by-step explanation:
The most crucial detail to include in a summary is option B, as it highlights a significant behavioral change in predators during specific times. This detail provides valuable insight into the natural behavior of aquatic creatures, particularly their increased activity during dusk and dawn.
The article seems to focus on the behavioral patterns of aquatic life, and the information about predators becoming more active during certain periods is likely a key aspect. Understanding when predators are most active contributes to a comprehensive summary that captures the essence of the article.
While the other options provide interesting details about fish, the increased activity of predators aligns more closely with the central theme of the article. Therefore, option B stands out as the most important detail to include in a summary, offering a glimpse into the dynamic nature of aquatic ecosystems during specific times of the day.