In nature, thunder is primarily produced by lightning, which is an electrical discharge between clouds or between a cloud and the ground. When a lightning bolt occurs, it heats up the surrounding air, causing it to rapidly expand and create a shockwave. This shockwave propagates through the air, creating a compression of air molecules that results in the sound we perceive as thunder.
Thunder is not produced by any specific living organism. It is a natural phenomenon that occurs during thunderstorms. While some animals, such as elephants, produce low-frequency sounds that can resemble distant thunder, their sounds are not directly responsible for the thunder heard during a storm.
It's important to note that thunder is a natural event caused by atmospheric conditions and electrical discharges, rather than being produced by any specific living creature.