Zoning: refers to the study used for DOB permit.
Circulation: refers to the way people move through and interact with a building. It can also relate to the flow of the building and paths people have to take to get places within the building.
Vegetation: refers to plants. They are important to a site because it creates privacy in a way to separate public from more intimate places outside the building. Also, it adds shade to the location it is placed it. Vegetation is a positive things because it can also be used to grow crops.