32
Q:
| A) Shark | B) Horses |
| C) Elephants | D) Dogs |
Answer: D) Dogs
Explanation:
Explanation:
Galton's whistle is also called as Dogs whistle or silent whistle, is a type of whistle that emits sound in the ultrasonic range, which people cannot hear but some other animals can, including dogs and domestic cats, and is used in their training.

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