Nepenthes, Dionaea, Drosera and Utricularia are

The correct option is D Carnivorous
A. Saprophytes are organisms which feed on dead and decaying matter.

B. Heterotrophs are organisms which depend on other living organisms for food.

C. Autotrophs are organisms which can produce their own food material

D. Carnivorous are organisms which feed on other animals.

All the above mentioned plants are insectivorous parasitic plants, they feed on other insects thus making them carnivorous plants.

The correct answer is 'Carnivorous'.