Question

how do pitcher plants obt. its food ​

Answer 1

pitcher plants obtain food by producing sweet honey like fluid at the brim.

when the insect comes to drink it they fall into the cavity due to the slippery fluid produced.

Answer 2

$\textbf{Pitcher plant }$ has a long pitcher like structure hanging from the tip of a leaf. The apex of the leaf forms a lid which can close and open the mouth of the pitcher. The inner surface of the pitcher has hair directed downwards.

When an insect enters the pitcher, the lid closes and the insect gets entangled into the hair. The insect gets digested by the digestive juices secreted in the pitcher.