Which type of casket handle combines the lug, arm, and bar into one single unit?

The bail handle is designed to integrate the lug, arm, and bar into one cohesive unit, which makes it distinct from other types of handles. This construction not only provides a unified appearance but also simplifies the casket's overall design. The bail handle typically features a curved design that allows for comfortable gripping, which is functional for the pallbearers during a service.

In contrast, other handle types are structured differently. For example, dome handles have a rounded top and may not combine all three components into a single structure. Loop handles typically consist of single loops or arcs attached to the casket rather than a combined assembly. Fixed handles are designed to be stationary and do not offer the same ergonomic advantages as the bail handle, which is optimized for ease of use during transport. This distinction in design and functionality highlights why the bail handle is the correct answer for combining all three components into one unit.