Atype of relationship that shows an order or process is called:
a. chronological
c. spatial
b. cause and effect
d. comparison and contrast

Let's work backwards.  A "comparison and contrast" relationship is just that: you compare and contrast two or more ideas.  A "cause and effect" relationship is a sequence of causes and their effects.  A "spatial" relationship is based on objects' physical positions, and a "chronological" relationship is based on the order in which events occurred.  The answer is most likely A: chronological.

A

Both the han and the roman empire decline as a result of social unrest during their collapse.