Answer:
To study objects that are way too small 
 
        
             
        
        
        
Metamorphic rock can change into igneous or sedimentary rock. Igneous rock forms when magma cools and makes crystals. Magma is a hot liquid made of melted minerals. The minerals can form crystals when they cool. I hope my answer has come to your help. God bless and have a nice day ahead!
        
             
        
        
        
Answer: The 3rd one, answer C
 
        
                    
             
        
        
        
When a client comes into the emergency room (er) after hitting his head while playing any sport, if he is alert and oriented. immobilize the client´s head and neck would be a priority nursing intervention, because  a head injury is treated as if a cervical spine injury is present until x-rays confirm their absence, then call for an immediate head computed tomography to look for any spine or head injury.
        
             
        
        
        
The population doesn’t grow(increase) anymore and the number of organisms stay at about that point(the carrying capacity).