In the conventional Class I composite preparation, retention is achieved by which of the following features? 1. Occlusal convergence 2. Occlusal bevel 3. Bonding 4. Retention grooves

Typically, the Class I composite preparation has occlusally converging walls that provide primary retention form. The actual bonding also provides retention form. However, an occlusal bevel is not indicated on Class I preparations nor are retention grooves used.