42 or 43 is the number of how many total countries in the western hemisphere 
        
             
        
        
        
Answer:
a decrease in life expectancies 
 
        
             
        
        
        
It is the Arabian Sea, because it is directly to the West of India and is also part of the Indian Ocean, which is South of the Arabian Sea.
 
        
                    
             
        
        
        
Answer:
The solid part of a rocky planet is the geosphere.
Explanation:
Geosphere; is correct because it is representing the surface and near-surface part of a rocky planet, which is the solid part of it.
Channel; is not correct because it is a term that can be used in several different manners in several different fileds, but it doesn't represent in any sense a solid part of a planet.
System; is not correct because it can refer to any kind of system.
Biospheres; is not correct because it is the sphere representing the living organisms and their habitats.