Answer:
answer choices? well this is what i think could work for your answer. homeland security and space exploration.
Explanation:
Explosion and lava need to be observed best i can do tell me if this helped
The main reason why the building of canals slowed in the 1830s and 1840s was because "Railroads started in America at this time" and the five ways in which the South was affected would be "Slaves became more important and valuable" "Land under production declined" "Southern attitudes about slavery hardened" "Cotton became the principal southern crop" and "<span>Cotton became a major U.S. export", since there was never a Caste system in the South. </span>
"C. was overthrown by invading Mongol tribes in A.D. 1279" would be the best phrase describing China's Song Dynasty, but this was of course not always the case.
Causes of the American Revolution were that the British Government set taxes on goods for the American Colonies to pay without the consent of the American people themselves. The Result was that the American Colonies gained independence for the British Empire.