Which of these plants opens its mouth when an insect sits on its lid?

The Pitcher plant is a type of carnivorous plant that lures insects with nectar and bright colors. When an insect lands on its lid, it sometimes triggers the mechanism to open or become slippery, causing the insect to fall inside where it is digested. This unique adaptation helps the plant survive in nutrient-poor soils by supplementing its diet with proteins from insects.