Answer:
They sit into a curl so they can conserve body heat and stay warm during those cold winter months
Explanation:
During winter animals sit into curl in order to avoid cold and reduce the heat emission.
When the animals feel cold, they curl their bodies into a ball like structure so as to decrease the surface area of their bodies.
The total energy radiation by a body changes as the change occurs on the surface area of the body, the loss of heat due to radiation would be reduced so we can conclude that during winter animals sit into curl in order to avoid cold and reduce the heat emission.
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