Answer:
First, I will take help from administrative records related to the agriculture in tribal areas. Then, I will study the old records, notices and information related to the same. Finally, I will collect the information from the documents produced by different researchers in country as well as outside the country.
 
        
             
        
        
        
Yes, it is true that early humans had to endure changes in climate and environment, since things like global warming and cooling, along with major events like the Little Ice Age, meant that the temperatures in the world were changing dramatically. 
        
             
        
        
        
This is known as the Columbian Exchange; option A. This includes for example Coffee and Chocolate (the plants); which are today to a great degree cultivated in a continent different than the one they originally evolved on.   
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Answer:
La educación espartana estaba basada en las enseñanzas militares, pero también culturales, y tenía un programa preciso que debían cumplir todos y cada uno de los nuevos espartanos. ... Desde la infancia eran iniciados en ritos ancestrales, cuyo único fin era el de crear fuertes guerreros espartanos.