R. C. Poller has written:

'Electrophilic aromatic substitution'

in aromatic amines due to the presence of of the amine group, the conjugation of the benzene ring proceeds through making the ring more stable.

Electrophilic Aromatic Substitution is an example of Ortho and para directing group and meta directing group.

That's an electrophilic aromatic substitution reaction ad will replace a hydrogen with a NO2 group on the ring

i think the question is wrong.benzene doesn't respond nucleophilic substitution respond electrophilic substitution it is electrophilic then due to resonance there is a partial double bond between carbon of benzene and halogens.so halobenzenes are chemically inert towards electrophilic substitution.