What is the primary function of dynamic study modules?

The dynamic study modules are delivered to help students check and progress their understanding of material they must master to do well in your course. Students can use these dynamic study modules for self-study, and can allocate individual components for practice, credit, or extra credit. If a dynamic study module comprises questions are not covering in your course, the student can modify the module to remove the questions that do not apply.

Its either a) or b),wind and water erosion gradually widen the canyon