The softest part of the body is the brain.
The brain is a delicate organ, protected by the skull and surrounded by cerebrospinal fluid. It is composed of soft, spongy tissue that is highly sensitive to pressure and trauma.
While other parts of the body, like the skin, muscles, and organs, can have varying degrees of softness, the brain's unique composition and function make it the most delicate and, therefore, the softest part of the body.