Answer:
To show a contrast
Explanation:
If we look at the statement closely, we will observe that people's idea of the feeding mode of Venus Fly Trap is different from the way the plant actually feeds.
People have the idea that the Venus Fly Trap eats larger animals (meat) whereas it only eats tiny insects. The transition 'despite' as used in the sentence shows a contrast between people's idea of the Venus Fly Trap and its actual feeding mode.
