The best-known carnivorous plant is the Venus flytrap. This amazing plant has a very limited natural habitat: a narrow strip of land about ten miles wide and one hundred miles long in North and South Carolina. The process that usually happens when an insect lands on a Venus flytrap is this: The insect touches the hairs on the upper side of the leaf blade, triggering a reaction that causes the two halves to snap together. The stiff hairs around the edge of the blade interlock, and the insect is trapped like a prisoner behind bars. Digestive enzymes on the leaf break down the insect’s proteins, and the plant absorbs from its victim the extra nitrogen that it needs. Which action starts the series of events described in the selection?

The Venus flytrap grows hungry.

The insect lands on the Venus flytrap.

The Venus flytrap releases digestive enzymes.

The halves of the leaf snap shut on the insect.