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Information and Ideas practice question

To count the island's seals without disturbing them, the researchers photographed the beaches from a small drone flown at 120 metres, a height at which earlier trials had shown the animals did not react. Counts from the images were then checked against counts made on foot at two beaches.

According to the text, why did the researchers fly the drone at 120 metres?

  1. A. Earlier trials showed that at that height the seals were not disturbed.Correct
  2. B. It was the drone's maximum altitude.
  3. C. The images were clearer from that height.
  4. D. Counts on foot were impossible.

Answer: A. Earlier trials showed that at that height the seals were not disturbed.

The height came from trials of the seals' reactions.

Why the other answers are wrong

B. It was the drone's maximum altitude.
Not stated.
C. The images were clearer from that height.
Not stated.
D. Counts on foot were impossible.
Counts on foot were made at two beaches.

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