Atheory usually has observation and reasoning in its favor, although it may not be experimentally verified. a. true b. false

That statement is true

Theory usually created after we find a result of our experiments. It is used to provide some sort explanation that become the foundation that explain why the experiment provide that current result. This initial explanation should be researched further through additional experiments in order to be verified.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.