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Information and IdeasHardEvidence that a species has returned

Information and Ideas practice question

Conservationists claim that otters have returned to a river from which they vanished in the 1970s.

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

  1. A. Otter footprints and droppings have been found on the river's banks at six sites this year, and a camera trap has recorded an adult otter with two cubs.Correct
  2. B. Otters were common on the river in the 1950s.
  3. C. The river's water quality has improved since the 1970s.
  4. D. Otters live on several other rivers in the region.

Answer: A. Otter footprints and droppings have been found on the river's banks at six sites this year, and a camera trap has recorded an adult otter with two cubs.

Direct signs of otters now.

Why the other answers are wrong

B. Otters were common on the river in the 1950s.
The past, not the present.
C. The river's water quality has improved since the 1970s.
A condition for return, not evidence of it.
D. Otters live on several other rivers in the region.
Other rivers.

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