What is the term for support platforms that elevate stages or camera operators?

The term "risers" specifically refers to support platforms that elevate stages or camera operators. This terminology is commonly used in the production and events industry to describe structures that raise other elements to a higher level. Risers are typically used to enhance visibility for audiences, provide better camera angles, or create a more dynamic setup for performers and speakers.

In contrast, while "platforms" could generally refer to surfaces used for various purposes, it does not specifically capture the elevation aspect unique to risers. "Frames" tends to denote a supporting structure but is not specific to elevation, and "supports" is a broad term that could refer to any type of structural assistance without the elevation characteristic. Therefore, the specificity and common usage of "risers" make it the correct choice in this context.