Answer: The optimum tariff.
Explanation:
The optimum tariff maximizes the liquid benefit resulted by the improve of the nation’s terms of trade, althought the volume reduction of trades.  
In one side, the terms of trade of the country who imposes the tariff improve. On the other side, those of the trade partner decrease.  
It should be noted that even that the terms of trade of the country that impose the tariff improved, those are smaller if compared to the losses of the trade partner
 
        
             
        
        
        
Answer:
The answer is a bridge.
Explanation:
A bridge is made and built to go over rivers, not naturally made by the earth, therefore it is not a landform.
 
        
             
        
        
        
(not 100% sure) but the first thing that comes to mind for me is the Egyptian religion.
        
             
        
        
        
Tyson's effect on Esteban and his life could be best described by ethos.
<u>Explanation:</u>
Ethos is a word that best describes the guiding beliefs or ideals that characterize a community, nation, or ideology. A man's character or personality can be explained by ethos; it also explains the balance between passion and caution.
Aristotle is a Greek philosopher, he coined the word “Ethos”.
Esteban responds that Neil deGrasse Tyson is his hero and he wants to give back to his own culture through spreading scientific knowledge, just like Tyson did. In the above statement, ethos best describes the Tyson's effect on Esteban and his life.
 
        
             
        
        
        
The answer is a "Hermit".
A hermit is a man who lives alone and apart from society, for the most part for religious reasons. In Christianity, the term was initially connected to a Christian who carries on with the eremitic life out of a religious conviction, to be specific the Desert Theology of the Old Testament i.e., the 40 years meandering in the desert that was intended to cause a change in heart.