Answer:
Inception and Elaboration phases
Step-by-step explanation:
INCEPTION PHASES can be defined as the phase in which the vision of the end-product is been define as well as the associated business case and as well enables the defining the overall scope of a project.
The ELABOTATION PHASE on the other hand can be seen as the phase which help to refine the definition of a product as well help to develop a more precise plan for its development as well as the deployment.
Therefore In the Unified Process (UP) methodology, "most of the Requirements activities" occurs during the INCEPTION AND ELABORATION phases because unified process is a software development process that enables as well uses the UML language to help represent models or type of the software system to be developed.