Depends on the context, but it would seem like a comparative to me
The post office is the adjective clause
<span>Teresa drew a quadrilateral with two pairs of parallel sides and four right angles.
There can be two possible answers. Either a Square or a Rectangle.
Both have four right angles, and two pairs of parallel sides. Square has all sides that are equal.</span>
The definition of exclusively- restricted or limited to the person, group, or area concerned.
Hope this helped!