Explanation:

Box 1: Create a new enum base data type.
An enum is a list of literals.
Box 2: Create a table extension
After base enums and EDTs are created, they are usually added to a table to enable data capture.
Box 3: Use a field group
Field and Field Groups is the most common data entry subpattern and uses a dynamic number of columns to present multiple fields or groups of fields.
The group controls within this pattern can be used either to group fields under a label or to bind to a table field group.
Reference:
https://docs.microsoft.com/en-us/learn/modules/build-edt-enums-finance-operations/
https://docs.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/user-interface/fields-field-groups- subpattern