Option 1, which consists of Sundew, Venus fly trap, and Pitcher plant, is the correct answer. These three plants are all examples of carnivorous plants.

1. Sundew: Sundews have leaves covered in sticky hairs that capture insects. Once an insect becomes trapped, the plant releases digestive enzymes to break down the insect and absorb its nutrients.

2. Venus fly trap: Venus fly traps have specialized leaves that snap shut when triggered by an insect. The plant then secretes enzymes to digest the trapped insect.

3. Pitcher plant: Pitcher plants have specialized leaves in the shape of a pitcher, which contain a pool of digestive enzymes at the bottom. Insects are lured into the pitcher by nectar and become trapped in the digestive liquid.

While the other options include some interesting plants, they do not fall under the category of carnivorous plants. Therefore, option 1 is the correct choice.