Step 1: Define Pitching.
Pitching is a ceramic joining technique applied to wet pottery pieces. Bonding is facilitated by applying slip, a clay-water mixture, to the edges.
Step 2: Evaluate Joining Agents.
- (1) Slip: Correct. Slip is the appropriate material for joining in pitching.
- (2) POP: Incorrect. Plaster of Paris is for molding, not joining pottery.
- (3) Fevicol: Incorrect. Fevicol is an adhesive but not standard for ceramic applications.
- (4) Grog: Incorrect. Grog, fired clay aggregate, prevents shrinkage and does not join parts.
Step 3: Final Determination.
Therefore, the correct choice is (1) Slip.