Answer:
Product.
Explanation:
Product departmentalisation is the process by which activities are grouped by product line or service so that all activities related to that product are under one manager.
Each product line has a department and specialists to handle all processes in making that product.
Dewey, Cheatum make four car models, a hybrid sport utility, a sports car, a four-door sedan, and a compact car. Employees work on only one type of vehicle, and separate marketing and product development processes are designed for each type of vehicle.
This is product departmentalisation.