1-What is rain shadow? 2-why might a mountaintop and a nearby valley have widely different temperatures?

1. a region having little rainfall because it is sheltered from prevailing rain-bearing winds by a range of hills.

2. The reason is that temperature decreases with elevation-the height on Earth's surface above sea level. Mountains also create wet and dry areas.

Explanation:

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; fair labor and standard act;