What type of parameters allow for complex formulas and dynamic member retrieval?

The correct choice is Bound List because this type of parameter is specifically designed to enable complex formulas and facilitate dynamic member retrieval. In OneStream, a Bound List parameter ties values to a specific context, allowing users to create calculations that respond dynamically to the selected members within the application.

This means that when a Bound List is used in a formula, it can adapt based on user selections, making it very powerful for scenarios where calculations need to reflect varying dimensions or attributes based on interaction. This flexibility enhances the capability of users to create robust and intricate financial models or reports.

Other parameters, while valuable in their own right, do not provide the same level of complexity or dynamic retrieval. For instance, Member Lists and Dynamic Lists serve specific functions, primarily around predefined selections and dynamic entries, but they lack the comprehensive adaptability that Bound Lists offer for complex calculations. Hierarchical Parameters are useful for hierarchical data structures but do not inherently support complexity in formulas like Bound Lists do.