A) Rat
B) Gibbon
C) Ostrich
D) Snails
View Answer
D) Snails
Explanation : Snails, slugs, and worms do not actively produce sound as a means of communication. The only sound they are known to make is when they move and their bodies rub against the ground. Jellyfish are another example of an aquatic animal that does not make noise on purpose.
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(Q) Which animal do not make any sound ?
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