Final answer:
Mass finishing is the abrasive process that tumbles workpieces with abrasive material to improve their surface conditions.
Step-by-step explanation:
Among the options provided - lapping, honing, mass finishing, and part deburring - the abrasive process that involves tumbling workpieces with abrasive material is mass finishing. This process is widely used in the manufacturing industry for simultaneously finishing a large number of parts to improve their surface conditions.
In mass finishing, parts are placed in a finishing machine along with abrasive media, compounds, and water. The machine vibrates or rotates to cause the media to rub against the parts, effectively smoothing, polishing, or cleaning the surfaces without manual intervention.