With their life-support running low, they are forced to take shelter in a carnivorous plant, using the process of photosynthesis so the plant will generate oxygen and keep them alive.
He liked that it came with a separate book of art; in particular the before and after illustrations of the carnivorous plant with a built-in bunny lure.
Hence, a carnivorous plant will have both decreased photosynthesis and increased respiration, making the potential for growth small and the cost of carnivory high.