<span>Marco Polo was known for his extensive travel through-out _China_______ as described in his books about his travels.
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Lingua Franca is a language that people of different languages use to communicate. The answer is English.
        
             
        
        
        
This would be by the influence of migration and distinct ethnic groups of each country
        
             
        
        
        
Answer:
Bathymetry
Explanation:
Bathymetry is the study of underwater depth of ocean floors or lake floors. Basically bathymetry is the underwater equivalent to topography