Le corbusier believed that architecture should show a magnificent play of volumes in space movement light color

The correct answer is "light." Le Corbusier believed that architecture should show a magnificent play of volumes in "light." He believed that architecture is the masterly, correct and magnificent play of masses brought together in light.

This sounds like a personal reflection on something you did. it is asking the hardest part, or a part you may have struggled with on an informal interview you must have done. it is also asking advice you'd give someone else for the process of completing an informal interview, so you should write something that would . for example, maybe the first thing they should do, something they should include.