What assessment task would best used to measure the learners acquisition of desired competencies ?

A performance-based assessment task would be best used to measure the learner's acquisition of desired competencies. This type of assessment requires the learner to demonstrate their skills and knowledge in a real-world or simulated scenario. This could include tasks such as completing a project, solving a problem, or performing a task related to the desired competencies. Performance-based assessments provide a more authentic measure of the learner's abilities and can help to identify areas where further development is needed.