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Expression of IdeasEasyIntroducing an animal to newcomers

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - The platypus is a mammal. - It lays eggs. - It has a bill shaped like a duck's. - It lives in the rivers of eastern Australia. - Male platypuses have a venomous spur on each hind leg.

The student wants to introduce the platypus to an audience unfamiliar with it. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. The platypus, an egg-laying mammal of eastern Australia's rivers, has a bill shaped like a duck's.Correct
  2. B. Male platypuses have a venomous spur on each hind leg.
  3. C. The platypus lives in the rivers of eastern Australia.
  4. D. The platypus, like other birds, lays eggs.

Answer: A. The platypus, an egg-laying mammal of eastern Australia's rivers, has a bill shaped like a duck's.

What it is, where it lives, and its oddest features — choice A introduces the animal.

Why the other answers are wrong

B. Male platypuses have a venomous spur on each hind leg.
A detail with no introduction.
C. The platypus lives in the rivers of eastern Australia.
Location only.
D. The platypus, like other birds, lays eggs.
The notes say the platypus is a mammal, not a bird.

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