Question

why does Pitcher plant eat insects

Answer 1

Meat-eating, or carnivorous, plantscan trap and digest insects and other small animals. They do this to obtain the vital nitrogen that they need to grow. Most plantsabsorb enough nitrogen from nitrates in the soil.

Answer 2

to get nitrogen from insects.. nitrogen is an important nutrition required for this plant so it gets nitrogen by trapping the insects in its juices and digesting them.