A preference for known risks over unknown risks is best described as follows

Ambiguity aversion

Explanation:

In economics and decision theory in general, ambiguity aversion refers to the preference for known risks over unknown risks. This means that in a scenario in which there´s an option in which probable outcomes are unknown, people would rather choose an option in which probable outcomes are known.

No to be confused with risk aversion, which only applies to situations where each probable outcome can be established.

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

answer; the correct answer is (ethics);