Shivering
In the analogy of Central Heating to the human body, the appropriate comparison would be shivering. Here's why:

Regulation of Temperature
Just like how central heating systems regulate the temperature of a building, the human body has its own internal system for maintaining a stable body temperature. When the body senses that it is too cold, it initiates a response to generate heat and warm up.

Response to Cold
Shivering is a physiological response to cold temperatures. It is the body's way of generating heat by causing the muscles to contract and relax rapidly, which produces warmth. This process helps to increase the body's temperature and counteract the feeling of coldness.

Efficiency in Heat Production
Similar to how central heating systems efficiently produce heat to warm a building, shivering is an efficient way for the body to generate heat quickly when needed. It helps to prevent hypothermia and maintain the body's temperature within a safe range.

Automatic Response
Shivering is often an automatic response triggered by the body's thermoregulatory system without conscious control. Just like how central heating systems can be programmed to adjust temperature settings automatically, shivering occurs instinctively to protect the body from the cold.
In conclusion, shivering in the human body is analogous to central heating in a building as both mechanisms work to regulate temperature and maintain a comfortable environment.

By shivering human body generate heat