How to create and add following forms in adaptive forms:
1. Interactive communication
2. Data integration
3. Adaptive form fragment
4. Document fragment
5. Form set
Check Adobe Experience Manager Help | AEM 6.5 Forms User Guide
interactive communication is not an adaptive form but similar module. Designing IC is different from adaptive form.
Data integration is used for IC or adaptive form binding to read and write data from different data sources.
Form fragment is used in Adaptive form while document fragment is used in Correspondence (now IC).
All have different use and are used for specific purposes please elaborate the use case.