A level chemistry question

There is a benzene ring with a -NHCOCH3 attached. A reaction occurs and the group attached to this benzene ring changes to -NH2. The answer says that this is a hydrolysis reaction. Please may someone explain this to me?

So you have benzene with an amide bond.
The formation of an amide bond, using COOH and NH2, to produce H-N-C=O, releases water (H2O), a condensation reaction.
The opposite, breaking the amide bond, must use water (so is hydrolysis, water-splitting reaction), to make the COOH and NH2.
In your case, it becomes benzene-NH2 and CH3COOH