Final answer:
The following sentence from the passage: He seemed to have a knack for knowing where all the active fish were, the active fish are a) Fish that are lively and energetic in their behavior and d) Fish that exhibit high metabolic activity and quick movements.
Step-by-step explanation:
The term 'active fish' refers to fish that are lively and energetic in their behavior. They are fish that exhibit high metabolic activity and quick movements. This can be observed in their swimming patterns, as they are constantly moving and actively engaged in hunting for food.
Fish are ectothermic vertebrates that live in aquatic environments. They have gills for breathing oxygen in water and fins for propelling and steering their body through the water. Many fish species swim in coordinated patterns in schools, which allows them to respond quickly to predator threats. The precisely coordinated movements of fish in a school can be facilitated through aural signals, which serve as a form of communication between individuals.
In conclusion, active fish are lively and energetic in their behavior, exhibiting high metabolic activity and quick movements. They are constantly swimming and actively engaged in hunting for food. The coordinated movements of fish in a school can be facilitated through aural signals, allowing them to respond rapidly to predator threats. The correct answer is a) Fish that are lively and energetic in their behavior and d) Fish that exhibit high metabolic activity and quick movements.