Explanation:
Graphical user interface, text, application Description automatically generated

Box 1: Computed
Computed field: Value is generated by an SQL view computed column.
During read, data is computed by SQL and is fetched directly from the view.
Box 2: Computed
Box 3: Virtual
Virtual field:
Is a non-persisted field.
Is controlled by custom X++ code.
Read and write happens through custom X++ code.
Virtual fields are typically used for intake values that are calculated by using X++ code and can't be replaced by computed columns.
Box 4: Virtual
Virtual field is a non-persisted field.
Reference:
https://docs.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/data-entities/data-entity-computed-column