The zombies in The Walking Dead survive by feeding on human flesh.

In The Walking Dead, the zombies, also known as walkers, survive by consuming human flesh. These creatures are reanimated corpses that have been infected by a virus. Once infected, the virus takes over their bodies, causing them to lose all cognitive functions and become mindless, flesh-eating creatures. The zombies have an insatiable hunger for human flesh, and they will relentlessly pursue and attack any living beings they come across.

The zombies in The Walking Dead are able to survive by relying on their basic instincts. They have an incredible sense of smell, which allows them to detect the presence of living humans from a distance. Once they catch the scent of a potential meal, they will relentlessly pursue it until they are able to feed. The zombies are not deterred by obstacles or physical pain, as their sole focus is on satisfying their hunger.

Additionally, the zombies in The Walking Dead are able to survive due to their sheer numbers. The world in which the show is set is overrun with these creatures, and they are constantly on the hunt for fresh prey. This means that there is a constant supply of potential victims for the zombies to feed on, ensuring their survival.

It is important to note that the zombies in The Walking Dead are not immortal. They can be killed through various means, such as severe head trauma or destruction of the brain. However, their ability to survive and propagate is what makes them such a formidable threat in the post-apocalyptic world of the show.

In conclusion, the zombies in The Walking Dead survive by feeding on human flesh. They rely on their basic instincts, such as their sense of smell, to locate potential victims. Their sheer numbers and constant pursuit of fresh prey ensure their survival in the post-apocalyptic world. However, they can be killed through severe head trauma or destruction of the brain.