Question

How insectivorous plants fulfill their nitrogen requirement?

Answer 1

insectivorous plants feed on insects thus fulfilling their requirement of nitrogen

Answer 2

$\textbf{Insectivorous plants }$ are autotrophic as well as heterotrophic.

They made their own food but still eat insects.

Thier food actually lacks nitrogenous compounds, hence, to fullfill the requirement of the nitrogen they eat insects.

Thus, we can say that they eat insects to fulfill their nitrogen requirement.