Final answer:
The Agile software development method prioritizes features based on client value through the practice of backlog prioritization within frameworks like Scrum or Kanban, focusing development efforts on the most valuable features first.
Step-by-step explanation:
The lightweight agile software development method that prioritizes features based on client value is known as agile software development, or more specifically, the practice of backlog prioritization within Agile frameworks like Scrum or Kanban. In these Agile methodologies, a product backlog is created, which contains all the possible features, changes, fixes, and enhancements desired in the product.
The items on the backlog are then prioritized based on the value they provide to the client, which takes into account both the user's perspective and the business objectives. This ensures that the development team works on the most valuable features first, affording quick and continuous delivery of value through iterative development cycles.
An example of this is a Scrum practice called sprint planning' where the development team selects items from the top of the prioritized backlog to deliver in a short, defined time frame called a sprint, focusing on delivering client value efficiently.