What type of houses did the Fremont live in?

The Fremont people lived throughout Utah and adjacent areas of Idaho, Colorado, and Nevada from 700 to 1300 AD. The culture was named for the Fremont River and its valley in which many of the first Fremont sites were discovered.

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.

what are the answer choices?