It was commercially important. It allowed for the shipping of commercial goods and saved time + money.
Two mountain ranges, the Alps and the Apennines, helped to protect Rome from invasion. The Apennines divide the Italian peninsula in half and, according to SPQR Online, allowed the Romans to mass forces for counter-attack whenever they were threatened.
Established the power of judicial review for the US supreme court and lower federal courts, judges determine wether or not a law is unconstitutional or not, which led to US involvement in the french british war in 1803
Answer: the answer is practiced argiculture
Explanation: