♥ The Plow invention increased crop yields and made soil more porous
I believe the first answer is The Turks captured Constantinople closing the path to the Silk Road. The second is Europeans developed the economic system of mercantilism and needed reserves of gold and silver. Hope I helped!
Answer: The campaign centered mainly on economic issues, especially the protectionist 1890 McKinley Tariff. Cleveland ran on a platform of lowering the tariff and opposed the Republicans' 1890 voting rights proposal.
Explanation: