Answer:
New farming equipment made work faster and also lessened the need of farm hands. It also gave federal land to the states to help finance agricultural colleges, and the Hatch Act of 1887 established agricultural experiment stations to inform farmers of new developments.
Explanation:
 
        
             
        
        
        
Answer:
A. The divide between Eastern and Western Europe.
Explanation:
The term "Iron Curtain" refers to the imaginary and invisible boundary line that divides Europe based on political, ideological as well as military beliefs. This barrier is not a literal/ physical barrier like the Berlin wall, for it is just a "thought process" barrier of the Soviet Union.
This imaginary barrier was developed to prevent any form of influence from the western side of Europe. Soviet Union tried to prevent any influence from its western counterpart after World War II, preventing any form of contact between the two. This concept of the Iron Curtain was to make sure the Eastern side remains devoted to the Soviet's belief and not become like the western side.
Thus, the correct answer is option A.
 
        
             
        
        
        
The correct answer is West Africa
The rice plantations were labor intensive and the farm holders relied on slave labor. The slaves working on the farms came from West Africa and were transported through the Atlantic. They comprised those captured in battle or sold as punishment
 
        
                    
             
        
        
        
Answer:
George Perkins Marsh is the correct answer.
Explanation:
George Perkins Marsh was American philologist and diplomat is believed to be the first environmentalist. He recognised the irreversible impact of human actions on the Earth. It is considered to be a precursor to the sustainability concept. He also wrote the book Man and Nature.  His book was one of the earliest work of ecology. He argued that humans  are secured as long as man manages his resources properly and keeps them in good condition as resource scarcity can affect environmental equilibrium.