The reason why many of the machines that sped up production and travel invented during the 18th and 19th centuries is because "<span>D. There was a heightened interest in science during this time," since this was during the age of the Enlightenment. </span>
Answer:
Two mountain ranges, the Alps and the Apennines<u> helped to prote,ct Rome from invasion. </u>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.
Explanation:
