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Information and IdeasEasy–MediumFinding supporting a claim about a bird's return

Information and Ideas practice question

A birdwatcher claims that the same swan has returned to the mill pond every winter for six years.

Which finding, if true, would most directly support the birdwatcher's claim?

  1. A. The swan wears a numbered leg ring fitted six years ago, and the same number has been read each winter since.Correct
  2. B. Swans mate for life.
  3. C. The mill pond rarely freezes.
  4. D. Swans are large birds.

Answer: A. The swan wears a numbered leg ring fitted six years ago, and the same number has been read each winter since.

A ring number read every winter identifies the individual.

Why the other answers are wrong

B. Swans mate for life.
A general fact about swans.
C. The mill pond rarely freezes.
Explains why a swan might come, not that it is the same one.
D. Swans are large birds.
Irrelevant.

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