Proctor & Gamble departmentalizes by Tide, Pampers, Charmin, and Pringles. This is an example of departmentalization by

Product

Explanation:

Departmentalization - This is the breakdown of a single business into smaller unit under the same coordination for administrative and operational convenience.

Departmentalization by product - When business entity is divided into smaller manageable unit along the line of products produced by the organisation, that is what we called departmentalization by product.

Identical products or products with similar characteristics are placed under the same department.