Answer:
protective?
Explanation: i dont know what your answers could be but i would say whichever one has something to do with protecting the cities that have been used as an example because they were all built to protect. hopefully this is helpful and works for your answers!
Pericles instituted the world's first democracy in Athens.
Answer:
I belive the answer is C It protects the earth from solar radiation
Use the forumla y=Mx+b and rise over run when plotting it on the graph for each example
