Final answer:
Relief sculpture is the type of sculpture that projects from a background while remaining attached to it and is viewed from the front, similar to two-dimensional works.
Step-by-step explanation:
The type of sculpture that is similar to two-dimensional works and is viewed primarily from a frontal vantage point is known as relief sculpture. In relief sculpture, figures or other images are attached to a background but project from it to a varying degree. There are different levels of relief, including high relief, where the projection is significant, and low relief, or bas relief, where the projection is minimal. An example of relief sculpture in its simplest form could be found on a coin, where the imagery is raised above the flat surface but remains attached to it.