Final answer:
Predatory plants hunt prey in order to obtain nutrients that they cannot acquire from their environment through photosynthesis alone.
Step-by-step explanation:
Predatory plants hunt prey in order to obtain food and minerals that they cannot acquire from their environment. These plants, such as the Venus flytrap and pitcher plants, grow in nutrient-poor environments like bogs. In these environments, the plants have adapted by modifying their leaves to capture insects, which provide them with a supplementary source of much-needed nutrients like nitrogen.
Unlike animals, carnivorous plants do not use their prey as a source of energy, but rather as a supplementary source of nutrients. They still rely on photosynthesis, like other plants, to synthesize their own food (carbohydrates). However, they cannot acquire enough minerals from the soil alone, so they have evolved to capture and digest insects to supplement their nutritional needs.