Valleys can be found in areas where there are alot of Mountains, Canyons can be found in places near rivers,  plains are found in central North America, and Volcanoes can be found on islands. 
        
             
        
        
        
Answer: Some are located in Southeast Asia and the Pacific Islands. <span>The biggest rainforests are found on the Pacific coast of North America.</span> 
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100% China. You're welcome ;)
        
             
        
        
        
As high developed countries’ citizens are well-educated,it will not have a high illiteracy rate
The answer is A:)