Most plants make their own food from sunlight, water, and air, but a special group of plants usually grow in soil that is poor in nutrients, so they get extra food by trapping small insects.
One of the most famous is the «Venus flytrap», which has leaves shaped like a trap. When an insect touches the tiny hairs inside the leaf, it snaps shut quickly, trapping the insect inside. The plant then releases a special juice that slowly digests the insect to absorb its nutrients.
There is also the «pitcher plant», shaped like a tall cup filled with sticky liquid. Insects slip inside and drown, unable to climb out. These plants never harm humans — trapping insects is simply a clever way they adapt to their poor-soil environment.