Defining the processes needed to operate a new service is part of:

A.
Service Design: Design the processes
B.
Service Strategy: Develop the offerings
C.
Service Transition: Plan and prepare for deployment
D.
Service Operation:IT Operations Management
I would think the answer would be B, as you are defining the service. Design of the process would come in service design.
I agree with A
It is actually 1 of the 5 major aspects of Service Design
I will correct myself I misread the question:
The purpose of a service strategy is to
articulate how a service provider will enable an
organization to achieve its business outcomes; it
establishes the criteria and mechanisms to decide
which services will be best suited to meet the
business outcomes