Question

Insectivorous plant are attractively coloured

Answer 1

The insectivorous plants get their nutrition from the bodies of the small insects, which they trap within their closed leaves or flower petals.

So these plants need to lure the insects to come close enough to them for getting trapped as their foods.

Therefore, the nature has added bright colors to these insectivorous plants, for attracting the unsuspecting insects towards these plants, who may misunderstand these colors to be of the flowers containing nectar.