<prompt> In the conventional Class I composite preparation, retention is achieved by which of the following features?1. Occlusal convergence2. Occlusal bevel3. Bonding4. Retention grooves2 and 41 and 31 and 42 and 3  <response>: 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. 