Answer:
Zinc
The reducing agent in these reaction is Zinc (Zn)
Step-by-step explanation:
Zn is the reducing agent because its oxidation state increases from 0 to 2 and hydrochloric acid, HCl is the oxidizing agent because it loses hydrogen ions, H+ based on the following balanced equation:
Zn (s) + 2HCl (aq) -----> ZnCl2 (aq) + H2 (g)
In oxidation, there is the loss of electrons.
In reduction, there is a gain of electrons.