Giraffes have the shortest sleep requirements of any mammal, with an average of just 30 minutes per day. They sleep in a reclined position with their long necks curled right round and their heads resting on their rears.
So, the correct option is D.
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Similar Questions
Q1
Identify the animal with shortest sleeping time.
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Q2
Given here is the sleeping time of some animals. Below each picture write for how many hours a day that animal sleeps.