What is an environment sculpture?

The answer is "a sculpture that has a relationship with its surroundings."

Environmental sculpture is sculpture that makes or modifies the earth for the watcher, instead of introducing itself figurally or fantastically before the watcher. A regular quality of bigger natural models is that one can really enter or go through the figure and be halfway or totally encompassed by it. Additionally, in a similar soul, it might be intended to create shadows or reflections, or to shading the light in the encompassing area.[

classical and renaissance ideals. he mainly focused in historical paintings, so you could also say that he drew his artistic inspiration from the bible, since he depicted and painted many scenes from it.