A land that had once run largely north-south<span> now ran east-</span>west. ... These changes mutually fueled the Second Industrial Revolution<span> which peaked ... River Valley, wheat in the </span>Midwest<span>, and manufactured goods in upstate New York.</span>
They learned how to use their weapon which was sturdy and made out of bronze. They also learned how to steer horse-drawn chariots.
Answer:
grow cotton on the Indians' land,
Explanation: