They all look like there decaying and was left out or sat inside too long
        
             
        
        
        
Answer:
brittle is not a characteristic of metals
 
        
                    
             
        
        
        
Answer:So far scientists have not found a way to determine the exact age of the Earth directly from Earth rocks because Earth's oldest rocks have been recycled and destroyed by the process of plate tectonics. If there are any of Earth's primordial rocks left in their original state, they have not yet been found.
Explanation:
 
        
             
        
        
        
Answer:
C. better meat
Explanation:
Farmers always are looking to better their stock to possibly increase milk production or increase the meat quality.