1) Show that pyrrole is aromatic.
2) Account for its aromaticity on the basis of orbital theory.
I have attached a response to this problem with this message. I hope it's clear for you to understand. In determining aromaticity in compounds such as these, the easiest approach is to get to grips with drawing the resonance ...
The solution gives a detailed paragraph on how to show that pyrrole is aromatic and account for its aromaticity with the aid of diagrams.