Choice C. Educated guess or a prediction that can be tested, based on limited evidence. 
 
        
             
        
        
        
The organelle which labelled A is C. golgi apparatus
        
                    
             
        
        
        
The answer to number 12 is mate.
 
        
                    
             
        
        
        
The answer would be the ozone layer. <span>A layer of ozone in the upper atmosphere absorbs </span>UV radiation<span> and </span>prevents<span> most of it from </span>reaching<span> the </span>Earth<span>. ... This means that more </span>ultraviolet radiation<span> can pass through the atmosphere to the </span>Earth's<span> surface, particularly at the poles and nearby regions during </span>certain<span> times of the year.
I hope that this helped you! Good luck. :)</span>