The Agile practice of estimating the effort required for each user story or task is known as _________.

In Agile methodologies, estimating the effort required for each user story or task is commonly referred to as "Story Pointing." Story Pointing involves assigning relative values (such as story points) to different tasks or user stories, based on their complexity, risk, and effort required. This practice helps Agile teams plan and prioritize their work effectively during sprint planning sessions. Sprint planning involves determining which user stories and tasks will be tackled in the upcoming sprint, whereas backlog refinement is the ongoing process of reviewing and updating the product backlog. Velocity tracking, on the other hand, is a measure of how much work a team can complete in a sprint, often calculated based on past performance. Therefore, the most appropriate option for estimating effort in Agile is Story Pointing.