Animals curl into a ball, when they feel very cold. Why?

Explanation

(d) When the animals feed cold, they curl their bodies into the ball so as to decrease the surface area of their bodies. As total energy radiated by a body varies directly as the surface area of the body, the loss of heat due to radiation would be reduced.
(e) Normal human body temperature (T) = `98.6^(@)F`
Convert Fahrenheit into Kelvin, `(F - 32)/(180) = (K - 273)/(100)`
So, `T = 98.6^(@)F = 310K`
From Wien.s displacement law
Maximum wavelength `lamda_("max") = b/T = (2.898 xx 10^(-3))/(310)`
`lamda("max") = 9348 xx 10^(-9) m`
`lamda("max") = 9348 "nm" (at 98.6^(@)F)`
During high fever, human body temperature
`T = 104^(@) F = 313K`
Peak wavelength `lamda_("max") = b/T = (2.898 xx 10^(-3))/(313)`
`lamda_("max") 9259 xx 10^(-9) m`
`lamda_("max") = 9259` nm (at `104^(@)F`)
(f) When animals feel cold, they curl their bodies into the ball so as to decrease the surface area of their bodies. As total energy radiated by a body varies directly as the surface area of the body, the loss of heat due to radiation would be reduced.