Final answer:
Use cases should be used when customers present their requirements using verbs. Use cases describe the interactions between the system and its actors.
Step-by-step explanation:
The analysis model that should be used when customers present their requirements using verbs is Use cases (use case diagram). Use cases are a powerful tool for capturing and representing functional requirements. They describe the interactions between the system and its actors, which can include users or external systems.
Use cases focus on the actions or behaviors that the system needs to perform in response to user actions. Verbs are often used to describe these actions, making use cases a suitable choice when requirements are presented using verbs.
For example, if a customer presents a requirement such as 'The system should allow users to submit orders,' a use case diagram can be used to represent this requirement as a use case labeled 'Submit Order' with the user as an actor.