Difficulty: Easy

Average Score: 80%

The sea slithers with fearsome predators, such as the starfish. Once a mussel is embraced by a starfish, for example, it is lost. Starfish use hydraulics instead of muscles, and in a tug-of-war they never tire. The starfish can drag open any shell and, as soon as the shell gapes, the starfish throws out its stomach like a white shroud and swallows the victim whole.

The primary purpose of the passage is to

Rationale

describe how a starfish conquers its prey.

The passage primarily focuses on the method by which starfish capture and consume their prey, detailing their unique hydraulic mechanism and feeding strategy. It emphasizes the effectiveness of the starfish's approach, showcasing its predatory behavior in the marine environment.

A (describe the physical characteristics of starfish) YOUR ANSWER

While the passage mentions the starfish's ability to use hydraulics, it does not provide a comprehensive description of its physical characteristics. Instead, it highlights its predatory actions rather than its anatomical features, making this choice inaccurate.

B (suggest that the starfish is the most fearsome predator in the sea) YOUR ANSWER

The passage does imply that the starfish is a formidable predator, but it does not explicitly state that it is the "most fearsome" among sea creatures. This choice overstates the passage's intent, which focuses on the starfish's method of hunting rather than ranking it among other predators.

C (specify a weakness in the defenses of the starfish) YOUR ANSWER

The text does not address any weaknesses in the starfish's defenses. Instead, it emphasizes its predatory prowess and successful technique in overcoming the defenses of its prey. Thus, this choice misinterprets the main focus of the passage.

E (discuss a stage in the life of the starfish) YOUR ANSWER

The passage does not discuss any developmental stages or life cycles of the starfish. It is solely concentrated on its feeding behavior, making this choice irrelevant to the content presented.

Conclusion

The passage effectively communicates how a starfish captures and consumes its prey, emphasizing its hydraulic mechanism and unique feeding strategy. By illustrating the starfish's predatory behavior, the passage serves to inform readers about its method of conquest rather than its physical traits, weaknesses, or life stages. This focus on predation clarifies the starfish's role within its ecosystem as an efficient hunter.

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