Final answer:
Assemblage is a sculpture technique more commonly used by modern artists than by artists in the past. It involves using found or altered objects to create new and unique forms.
Step-by-step explanation:
The sculpture technique that is more commonly used by modern artists than by artists in the past is assemblage. Assemblage is a method that uses found or altered objects to create a new form. Artists weld, glue, bolt, and wire individual pieces together to create unique sculptures. This technique became popular in the 1950s with artists like Duchamp and Rauschenberg, and contemporary artists continue to use it to create new and innovative artworks.