Answer
See answer below.
Work Step by Step
Nitric acid in water:
$HNO_3(aq)+H_2O(aq)\rightarrow H_3O^+(aq)+NO_3^-(aq)$
Nitric acid: acid, proton donor
Water: base, proton acceptor
Hydronium: acid, proton donor
Nitrate's ion: base, proton acceptor