Match each modular-design term to what it describes.

• Module → A self-contained unit responsible for one coherent part of the job
• Public interface → The part of a module that other modules may use
• DRY principle → The same logic should live in exactly one place
• Parallel development → Separate people work on separate modules, meeting at the interfaces

Modules and their public interfaces are the structure; DRY is the rule that decides where logic belongs; parallel development is a benefit that follows once boundaries are agreed. All three of the latter depend on the first: without real module boundaries there is nothing to publish, nowhere single to put logic, and no way to divide work.