Question

Which is an opinion statement in this article?

a. Special monumental arches called triumphal arches were also erected in Rome.
b. If you hold each end of a chain and let it droop between your hands, you have created a catenary curve.
c. An arch can carry more weight than a straight beam can across the same span, so it's a more powerful structure.
d. You're sure to find these lovely shapes in your town or city, too.

Answer 1

d. You're sure to find these lovely shapes in your town or city, too.

This is an opinion statement not a fact. There is a possibility that you might find lovely shapes in your town or city, but there is no guarantee that you will. The other statements are facts.