Basically physical and chemical  weathering (do not confuse with erosion, which involves movement) contribute to the destruction of mineral forms. In this case it breaks down the rocks, minerals and soils, creating slopes and hills. It may be caused by (any form of) water, wind, gravity, waves or sunlight. 
        
             
        
        
        
Well, this is surely not in the US. But the Garo, Khasi, and Jaintia Hills are all located in parts of Assam, India, and Meghalaya, India.
        
                    
             
        
        
        
I dont understand plz say it more clearly
        
             
        
        
        
Multicellular organisms e.g. man  meet their needs through use of specialized  systems that they have in their bodies. Examples of such include:
1. cardiovascular system composed of heart, veins and  arteries which facilitate transport of nutrients to all parts of the body .
2. Skeletal system composed of bones, joints, ligaments and cartilage whose function is support and protection of the body. 
3. Digestive system composed of mouth, esophagus, stomach , small and large intestines whose function is breakdown of food and absorption of nutrients.
 
        
             
        
        
        
Answer:
Correct answer is Wegener had no compelling mechanism to explain what would cause the continents to move.
Explanation:
A is not correct as through his researches he presented his theory to other scientist.
B is not correct as Wegener was very educated, and was even even working as a professor at University.
C is correct that although he presented his theory, he couldn't explain totally how it happened.
D is not correct as during his lifetime his theory wasn't widely accepted. That happened 20 years after his death.