Your question makes no sense please reword the question.
Its fur and blubber keep its body heat from escaping the body.
To keep heat from escaping your body to prevent your body from shutting down and you dying.
Mammals need to keep their body warm and it is possible by the body covering they have...fur and hair
We are mammals and mammals are land creatures. We have hair to keep ourselves warm.
A good time for a person to wear a thermal shirt is when the weather is around 0 degrees. The thermal shirt is used to keep in the body temperature, which is effected badly by the cold weather due to it escaping the body into the surroundings. Thermal shirts keep the body temperature from escaping so quickly and keep the person warm.
All aquatic mammals keep warm by trapping the heat they generate under a layer of fat called blubber. The blubber keeps their heat from escaping and thereby keeps their bodies warm.
They are mammals and mammals have fur on the body. And also, the fur on them is too keep themselves warm at arctic regions because these regions too cold regions
Snakes aren't mammals because they are cold-blooded and covered in scales. Snakes rely on the sun to keep their body temperature regulated. Mammals are warm-blooded and able to more easily regulate their own body temperature.
Heat is escaping your body.
All mammals are endotherms. They are able to regulate their body temperature and maintain homiostasis. Say the temperature drops to a chilling 30°F, their body will try to keep them warm by staying at a constant temperature.
Because they are trying to keep heat from escaping the body. It's the body's natural response. Just as when you are hot, the body opens it's pores to release sweat to keep the temperature down. The body is always trying to equal itself. This is called homeostasis. Hope the answer helps :)
It can help keep the animal's body heat from escaping its body too fast, it can protect its skin against superficial flesh wounds and prevent it from getting sunburned. It can also in some cases keep some animals relatively dry.