Which peritoneal fold attaches the liver to the anterior internal body wall?

The answer is falciform ligament. It also separates the left lobe into lateral and medial segments. It is a type of peritoneum (composed of two layers of tightly bound peritoneums). The ligament stretches from the underside of the diaphragm to the posterior surface of the sheath of the right rectus abdominis muscle, as low down as the umbilicus; by its right margin, it extends from the notch on the anterior margin of the liver, as far back as the posterior surface.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.